Regulation No. 118 on surface and ground water quality

1 Published: Latvijas Vēstnesis No 50, 03.04.2002 THE CABINET OF MINISTERS OF THE REPUBLIC OF LATVIA 12.03.2002 Regulations No. 118 Riga Regulations on surface and ground water quality (Protocol No 11, 40§) Issued pursuant to Section 12 paragraph 2 of the Law on Pollution and Section 18 paragraph 2 of the Law on Environmental Protection I General provisions 1. These Regulations define quality standards for surface water and groundwater. 2. The application of the measures taken pursuant to these Regulations may on no account lead, either directly or indirectly, to increased pollution of water, air or soil. 2 3. Where different water quality standards, laid down by these Regulations or other legislation, apply to a single water body or watercourse, the most stringent quality standards shall apply. II Water quality standards for surface waters 4. Water quality standards that specify quality objectives for the most dangerous substances (Annex 1) and dangerous substances (Annex 2) in water, shall apply to all surface waters, including priority fish waters, bathing waters and surface waters used for the abstraction of drinking water. 5. Water quality standards set in Annex 1 and Annex 2 shall be applied, considering the planned use of the affected territory, as well as the necessity to eliminate water pollution by the substances listed in Annex 1 and to reduce water pollution by the substances listed in Annex 2. 6. The Ministry of Environmental Protection and Regional Development shall evaluate the information included in Annex 2 at least once in every 4 years and, where necessary, amend it on the basis of: 6.1 data on the hazard to the aquatic environment and to human health caused by a specific substance or a 3 group of substances; 6.2 results of risk assessments; 6.3 data on the imported, produced and consumed amounts of the substance concerned, and information on its use and storage patterns; 6.4 well-founded proposals submitted by natural and legal persons and expert’s opinions. 7. The Ministry of Environmental Protection and Regional Development shall inform general public and environmental and health authorities as well as other relevant institutions about the progress of the evaluation. III Quality standards for priority fish waters 8. The Ministry of Environmental Protection and Regional Development shall designate priority fish waters - fresh waters needing protection or improvement in order to support fish life. The list of the priority fish waters shall be co-ordinated with the Ministry of Agriculture. The list shall be revised at least once in every 6 years. 9. The conditions of this section shall not apply to waters in natural or artificial fish ponds used for intensive fish farming. 4 10. Priority fish waters shall be divided into: 10.1 salmonid waters - waters which support or become capable of supporting fish belonging to species such as salmon (Salmo salar), salmon trout and trout (Salmo trutta), grayling (Thymallus thymallus) and whitefish (Coregonus); 10.2 cyprinid waters - waters which support or become capable of supporting fish belonging to the cyprinids (Cyprinidae), as well as species such as pike (Esox lucius), perch (Perca fluviatilis) and eel (Anguilla anguilla). 11. To control compliance of the priority fish waters quality with the requirements of these Regulations, water samples shall be taken at the frequency specified in Annex 3 at the same sampling point and over a period of 12 months. The priority fish water quality shall be deemed to conform to the requirements of these Regulations if: 11.1 95% of the samples for the parameters: pH, BOD5, non-ionised ammonia, total ammonium, nitrites, total residual chlorine, total zinc and dissolved copper, comply with the requirements of Annex 3. When the sampling frequency is lower than one sample per month, all samples shall comply with the above-mentioned requirements; 11.2 the percentage of samples specified in Annex 3 for the parameters: temperature and dissolved 5 oxygen, complies with the requirements; 11.3 the average concentration set for the parameter: suspended solids complies with the requirements of Annex 3 to these Regulations; 11.4 the concentrations of the most dangerous substances and dangerous substances do not exceed the quality standards set in Annex 1 and Annex 2; 11.5 there are no conditions that would be unfavourable to fish population. 12. Non-complying samples shall not be taken into consideration in the calculation of the percentages provided for in Paragraph 11 when they are result of floods or other natural disasters. 13. Non-compliance of the priority fish waters with the quality standards set in Annex 3 shall not be in breach of the requirements of these Regulations when it is due to the process where designated waters, without a human intervention, receives from the soil certain substances contained therein (hereinafter “natural enrichment”). IV Quality standards for bathing waters 14. Bathing waters are waters in which bathing is explicitly authorised by legislation, as well as waters where bathing is not prohibited and is 6 traditionally practised, with the exception of waters intended for therapeutic purposes and water used in swimming pools. 15. The water quality standards for bathing waters are set in Annex 4. These standards shall not apply to the bathing areas listed in Annex 1 to the Cabinet of Ministers Regulations No 300 of 11August 1998 ”Regulations on the establishment and hygiene of the bathing sites”. 16. To control compliance of the bathing waters with the requirements of these Regulations, water samples shall be taken at the frequency specified in Annex 4 at the same sampling point. The quality of bathing waters shall be deemed to comply with these Regulations if: 16.1 95% of samples comply with the limit values fixed in Annex 4; 16.2 90% of samples in all other cases comply with the guide values fixed in Annex 4, with the exception of the "total coliforms” and “faecal coliforms”, where the percentage may be 80%; 16.3 the remaining samples which do not comply with the quality standards do not deviate from the parametric values in question by more than 50%, except for microbiological parameters, pH and dissolved oxygen; 7 16.4 consecutive water samples taken at statistically suitable intervals do not deviate from the relevant quality standards. 17. Non-complying samples shall not be taken into consideration in the calculation of the percentages provided for in Paragraph 16 when they are result of floods or other natural disasters or abnormal weather conditions. 18. Non-compliance of bathing waters with the quality standards set in Annex 4 shall not be in breach of the requirements of these Regulations if such non-compliance has been caused by natural enrichment and does not cause hazard to human health. V Quality standards for surface waters used for the abstraction of drinking water 19. Surface fresh waters used or intended for the use in the abstraction of drinking water and supplied by distribution networks for public use (hereinafter “surface waters used for the abstraction of drinking water”) shall be divided into three categories, corresponding to the methods of treatment applied: 19.1 Category A1 corresponds to simple physical 8 treatment and disinfection; 19.2 Category A2 corresponds to normal physical treatment, chemical treatment and disinfection; 19.3 Category A3 corresponds to intensive physical and chemical treatment, extended treatment and disinfection. 20. Surface waters used for the abstraction of drinking water are indicated in Annex 5, including the appropriate category specified in accordance with Paragraph 19. The Ministry of Environmental Protection and Regional Development shall review the information included in Annex 5 at least once in every 4 years. 21. The water quality standards for surface waters used for the abstraction of drinking water are set in Annex 6. The quality standards shall apply before water is being sent for purification treatment according to the established category. 22. To control the compliance of surface waters used for the abstraction of drinking water with these Regulations, water samples shall be taken at the frequency specified in Annex 6 at the same sampling point. The quality of surface waters used for the abstraction of drinking water shall be deemed to comply with these Regulations if: 9 22.1 95% of the samples comply with the limit values fixed in Annex 6; 22.2 90% of the samples comply with all other requirements fixed in Annex 6 to these Regulations; 22.3 the remaining samples which do not comply with the quality requirements do not deviate from the parametric values by more than 50%, except for microbiological parameters, temperature, pH and dissolved oxygen, provided there can be no resultant danger to public health; 22.4. consecutive water samples taken at statistically suitable intervals do not deviate from the relevant quality standards. 23. Non-complying samples shall not be taken into consideration in the calculation of the percentages provided for in Paragraph 22 when they are result of floods or other natural disasters or abnormal weather conditions. 24. Non-compliance of surface waters used for the abstraction of drinking water with the quality standards set in Annex 6 shall not be in breach of the requirements of these Regulations if such non compliance has been caused by flood, other natural disasters or natural enrichment and if this non compliance does not endanger public health. 10 VI Quality standards for groundwater used for the abstraction of drinking water 25. The water quality standards set in Annex 9 shall apply to groundwater aquifers and groundwater bodies used for the abstraction of drinking water, where the average amount of the abstraction exceeds 10 m3 per day, as well as to those groundwater aquifers and groundwater bodies intended for future such use. 26. Where the quality standards for the parameters: chlorides, sulphates, conductivity, iron, or permanganate index, are exceeded due to natural processes, no direct or indirect emission or other activities shall be permitted, if such emission or activities may give rise to further increase of the respective parameters in the given aquifer or groundwater body. VII Water quality monitoring 27. The Latvian Environmental Agency shall fix exact sampling points, the distance from them to the closest point where pollutants are emitted and the depth at which the samples are to be taken for 11 the monitoring of the most dangerous substances and dangerous substances and for priority fish water monitoring. The Public Health Agency shall fix sampling points for the monitoring of bathing waters. 28. All analyses necessary for implementation of these Regulations shall be performed in a certified laboratory. The laboratory may use other methods of analysis than those specified in Annexes 3, 4, 8 and 9, where relevant Latvian national standards or international standards adopted in Latvia foresee change of methods and where the results obtained thereby are comparable to the results obtained by the methods referred to in Annexes 3, 4, 8 and 9 and if equivalent limit of detection, precision and accuracy can be achieved by these other methods, where: 28.1 limit of detection means the smallest concentration of the substance determinable in the sample, which can not always be expressed as a certain value; 28.2 precision means the difference between the results of independent tests performed under fixed conditions (a random error); 28.3 accuracy means the difference between the average experimental value obtained during numerous repeated measurements and the accepted 12 reference value (a systematic error). 29. The operator who discharges the most dangerous or dangerous substances into surface or ground waters shall monitor their emissions. The monitoring and control shall be performed in accordance with the Cabinet of Ministers Regulations No 34 “Regulations on emissions of pollutants into water” of 22 January 2002. 30. For the needs of the state environmental monitoring, the Regional Environmental Board shall identify the territories affected by discharges of the most dangerous or dangerous substances. The Latvian Environmental Agency shall summarise the collected information and control water pollution by the most dangerous substances and dangerous substances in accordance with the Cabinet of Ministers Regulations No 34 “Regulations on emissions of pollutants into water” of 22 January 2002. 31. The Latvian Environmental Agency shall monitor priority fish waters according to the requirements of Annex 3. 32. If monitoring data indicate that the oxygen concentration falls below 6 mg/l in salmonid 13 waters and below 4 mg/l in cyprinid waters, the Latvian Environmental Agency and the Regional Environmental Boards shall identify the causes for the decrease of the oxygen concentration and shall take measures to prevent harm to the fish population. 33. Where the monitoring data indicates that the quality of priority fish waters is appreciably higher than that required by Annex 6, the Latvian Environmental Agency may reduce the sampling frequency. If the Latvian Environmental Agency concludes that there are no pollution or no risk of deterioration in the quality of the given priority fish waters, it may decide than no sampling is necessary for the period of two years. 34. The Public Health Agency shall monitor bathing waters according to the requirements of Annex 4. The State Sanitation Inspection shall control the bathing water quality. 35. The water user that prepares drinking water and supplies it to the consumers shall monitor surface waters used for the abstraction of drinking water according to the requirements of Annexes 6, 7 and 8. 14 36. The samples of surface waters used for the abstraction of drinking water shall be taken at the place where surface water is abstracted before being sent for purification treatment. The containers used for samples, the agents or methods used to preserve part of a sample, the transportation, storage and preservation of samples must not be such as to bring about any significant change in the results of the analysis. The samples shall be analysed after sieving through a wire mesh sieve, to remove any floating debris, including pieces of wood and plastic. 37. The frequencies of sampling and analysis of surface waters used for the abstraction of drinking water may not be below the minimum annual sampling frequencies specified in Annex 7. Sampling must be spread over the year so as to give a representative picture of the water quality. 38. Where the monitoring data indicate that the quality of surface waters used for the abstraction of drinking water for certain parameters is considerably superior to that specified in Annex 6, the Public Health Agency may permit the operator to reduce the sampling frequency below that required in Annex 7. 15 39. A water user who prepares drinking water and supplies it to the consumers shall monitor groundwater used for the abstraction of drinking water according to Annex 9 and according to the conditions of the water abstraction site licence. 40. The methods used for analysis of the parameters specified in Table 1 of Annex 9 shall ensure the same limit of detection, precision and accuracy as indicated in Table 2 of Annex 9. Regardless of the performance characteristics of the used method of analysis, the results shall be indicated with the same number of decimal fractions as in Table 1 of Annex 9. VIII Pollution prevention measures 41. Where monitoring or other data indicate that the water quality standards for a certain water body are not achieved or are unlikely to be achieved within the set deadlines, the Ministry of Environmental Protection and Regional Development shall assign the environmental authorities to: 41.1 investigate the causes of failure; 41.2 examine relevant conditions of the Category A or B permit for a polluting activity or of the water use permit, establishing more stringent emission standards; 16 41.3 review and adjust as appropriate the monitoring programmes; 41.4 take additional measures to prevent further deterioration of water quality and to facilitate its improvement. 42. The Ministry of Environmental Protection and Regional Development shall not assign the activities referred to in Article 41 where their cause is force majeure, including extreme floods and prolonged droughts. 43. In accordance with Article 17 of the Law on Pollution, the Ministry of Environmental Protection and Regional Development shall develop: 43.1 an action programme to reduce pollution of priority fish waters and to ensure their compliance with the quality requirements specified in Annex 3; 43.2 an action programme to reduce pollution of bathing waters and to ensure their compliance with the quality requirements specified in Annex 4. IX Information 44. To inform the general public and public and municipal authorities about the protection of the aquatic environment, the Latvian Environmental 17 Agency shall: 44.1 every two years produce a report about the protection of surface and ground water, including therein the information about the application of Articles 13, 18 and 24 and the relevant measures taken; 44.2 include the results of the monitoring required under Articles 29, 30, 31, 34, 35 and 39 into annual Latvian State of the Environmental Report; 44.3 make available to the public the information submitted to the European Commission pursuant to Article 45. 45. To inform the European Commission, the Latvian Environmental Agency shall: 45.1 report on the amendments to Annex 1 and Annex 2 at least every four years; 45.2 report on the designation of the priority fish waters and bathing waters and on the amendments to their lists; 45.3 inform about the application of Articles 13, 18, 24 and 42 and the relevant measures taken; 45.4 report every three years on the protection of surface water and ground water and the implementation of these Regulations and once a year on the protection of bathing waters. The report on protection of surface and groundwater shall be sent within nine months after the end of the 18 calendar year in question whereas the report on protection of bathing water shall be sent before the end of the calendar year in question; 45.5 provide information about the action programmes referred to in Article 43: 45.5.1 for the first time: within 6 months after their publication; 45.5.2 updated information: every second year by 30 June; 45.6 provide information collected as a result of monitoring required under Section VII, within 6 months of the receipt of a relevant request; 45.7 provide information concerning the methods used for the monitoring of surface and groundwater. 46. Where priority fish waters cross or form national frontiers, the Ministry of Environmental Protection and Regional Development shall upon official request from the relevant state or upon its own initiative consult the states concerned in order to determine the waters where the quality requirements of Annex 3 shall apply and to determine the measures to be taken to comply with these requirements. 47. Where the quality standards specified by these Regulations have not been achieved or will not be 19 achieved in transfrontier waters within the set deadlines, the Regional Environmental Board shall inform the State Environmental Impact Assessment Bureau, which in turn shall inform the states concerned. X Transitional provisions 48. Chapter III and Articles 16, 30, 31, 32, 33 and 34 shall enter into force on 1 January 2003. 49. The Ministry of Environmental Protection and Regional Development shall develop the action programmes required under Article 43 and submit them to the Cabinet of Ministers for approval by 1 January 2004. 50. Paragraph 44.3 and 45 shall enter into force with special conditions. Prime Minister A. Bērziņš 20 Minister of Environmental Protection and Regional Development V. Makarovs 21 Annex 1 to the Cabinet of Ministers Regulations No 118 of March 12, 2002 Limit values for the most dangerous substances in surface waters N o CAS No Substance Limit value (1), µg/l saltwa ter fresh water 1 . 107 06-2 1,2-dihchloroethane 10 10 2. 120 82-1 1,2,4 trichlorobenzene 0.4 0.4 3. 309 00-2 Aldrin 0.01 0.01 4. 50 29-3 DDT, DDD and DDE 0.002 0.002 5. 60 57-1 Dieldrin 0.01 0.01 6. - Mercury and its compounds 0.3 (2) 1.0 7. 772- Endrin 0.005 0.005 22 N o CAS No Substance Limit value (1), µg/l saltwa ter fresh water 20-8 8. 87 68-3 Hexachlorobutadie ne 0.1 0.1 9. 118 74-1 Hexachlorobenzene 0.03 0.03 1 0. 608 73-1 Hexachlorocyclohe xane (all isomers) 0.01 0.01 1 1. 67 66-3 Chloroform 12 12 1 2. 465 73-6 Isodrin 0.005 0.005 1 3. Cadmium and its compounds 2.5 5 1 4. 127 18-4 Perchloroethylene or tetrachloroethylene (PER) 10 10 1 5. 87 86-5 Pentachlorophenol 2 2 1 6. 56 23-5 Carbon tetrachloride 12 12 23 N o CAS No Substance Limit value (1), µg/l saltwa ter fresh water 1 7. 79 01-6 Trichloroethylene (TRI) 10 10 1 8. Trichlorobenzene, technical mixture 0.4 0.4 Notes (1) The table indicates the average yearly maximum permissible concentration. (2) The limit value for transitional waters is 0.5 µg/l. Concentration of metals means concentration of their ions in water. Minister of Environmental Protection and Regional Development V.Makarovs 24 Annex 2 to the Cabinet of Ministers Regulations No 118 of March 12, 2002 Limit values for dangerous substances in surface waters No CAS No Substance Limit value (1), µg/l saltwat er freshwat er 1 2 3 4 5 I Metals and other substances 1. - Arsenic and its compounds 36 150 2. - Zinc and its compounds 81 120 3. - Chromium and its compounds 50 11 4. - Nickel and its compounds 8.2 52 5. - Lead and its compounds 8.1 2.5 25 No CAS No Substance Limit value (1), µg/l saltwat er freshwat er 1 2 3 4 5 6. - Copper and its compounds 3.1 9.0 II Organic substances 7. 75 35-4 1,1 dichlorethylene 100 100 8. 94 75-7 2,4-D 10 10 9. 107 05-1 3 chloropropene 100 100 10. 107 13-1 Acrylonitrile 8 8 11. 1912 224-9 Atrazine 1 1 12. 109 89-7 Diethylamine 100 100 13. 95 50-1 541 73-1 106 Dichlorobenzen e (1,2-; 1,3-; 1,4-;) 10 10 26 No CAS No Substance Limit value (1), µg/l saltwat er freshwat er 1 2 3 4 5 46-7 14. 75 09-2 Dichloromethan e 10 10 15. 124 40-3 Dimethylamine 10 10 16. 60 51-5 Dimethoate 1 1 17. 106 89-8 Epichlorohydrin 100 100 18. 122 14-5 Fenitrothion 0.01 0.01 19. - Phenols (phenol index) 300 300 20. 50 00-0 Formaldehyde 95,000 95,000 21. 67 72-1 Hexachloroetha ne 10 10 27 22 . 95-51 2 108 42-9 106 47-8 Chloroanilyne (2 ; 3- and 4-) 10 10 23 . 108 90-7 Chlorobenzene 1 1 24 . – Chloronaphtalene s, technical mixture 0.01 0.01 25 . 330 55-2 Linuron 1 1 26 . 121 75-5 Malathion 0.01 0.01 27 . 91-20 3 Naphtalene 1.2 1.2 28 . Organotin compounds (expressed as tin) 0.01 0.01 29 . Polychlorinated biphenyls (PHB) 0.01 0.01 30 . 122 34-9 Simazine 1 1 31 126- Tributylphosphat 100 100 28 29 . Polychlorinated biphenyls (PHB) 0.01 0.01 . 73-8 e 32 . 1582 09-8 Trifluralin 0.1 0.1 33 . 71-55 6 79-00 5 Trichloroethane (1,1,1 and 1,1,2-) 100 100 34 . 95-95 4 933 78-8 88-06 2 Trichlorophenols (2,4,5-; 2,3,5- and 2,4,6-) III Petroleum products 35 . Monoaromatic hydrocarbons (benzene, toluene, ethyl benzene, xylenes) with the total indicator BTEX 10 10 36 . Non-cyclic petroleum hydrocarbons 100 100 29 29 . Polychlorinated biphenyls (PHB) 0.01 0.01 37 . Polycyclic aromatic hydrocarbons (PAH) 0.001 0.001 Note. (1) The table indicates the average yearly maximum permissible concentration. Concentration of metals means concentration of their ions in water. Minister of Environmental Protection and Regional Development V.Makarovs 30 Annex 3 to the Cabinet of Ministers Regulations No 118 of March 12, 2002 Water quality standards for priority fish waters N o Parame ter/ unit Salmonid waters Cyprinid waters Method of analysis Minimum sampling frequency Guide value Limit value Guide value Limit value 1 2 3 4 5 6 7 8 1. Ammoni um (mg/l NH4+) < 0.03 < 0.78(1) < 0.16 < 0.78(1) Molecular absorption spectrophoto metry Distillation 31 and titration Flow analysis 2. Biologic al oxygen demand BOD5 (mg/l O2) < 2 < 4 Five days incubation method LVS EN 1899 1,2:1998 (oxygen by Winkler’s method or electrochemi cally) 3. Zinc (mg/l Zn) < 0.3 < 1.0 Atomic absorption spectrophoto metry Monthly 32 4. Phenoli c compou nds (phenol index) (mg/l C6H5OH ) 0.005 0.005 - Molecular absorption spectrophoto metry Flow analysis 5. Dissolv ed oxygen (mg/l O2) 50 % > 9 100 % > 7 50 % > 9 50 % > 8 100 % > 5 50 % > 7 Winkler’s method Electrochemi cal method Monthly at least 1 sample indicating the lowest daily O2 concentratio n (taken 33 before12.00 AM). If major daily variations are suspected, at least 2 samples per day shall be taken. 6. Total residual chlorine (mg/l HOCl) < 0.005(2) < 0.005(2) DPD method (diethil-p phenylendia mene) Monthly 7. Total phospho < 0.065 < 0.100 - Molecular absorption 34 rus (mg/l P) spectrophoto metry Flow analysis 8. Petroleu m hydrocar bons (3) (3) - Visual Gas chromatogra phy Infrared spectrophoto metry Monthly (4) 9. Non ionised ammoni a (mg/l NH3) < 0.005 < 0.025(5) < 0.005 < 0.025(5) Calculation based on concentratio ns of ammonium ions, Monthly 35 considering pH level and temperature 1 0. Nitrites (mg/l NO2-) < 0.01 < 0.03 - Molecular absorption spectrophoto metry Liquid chromatogra phy Flow analysis 11 . pH (pH units) 6 - 9(0), (6) 6 - 9(0), (6) Electrochem ical method using pH meter Monthly 12 Suspend < 25(0), < 25(0), (7) Filtration 36 . ed solids (mg/l) (7) through glass fibre filter, LVS EN 872:1996 13 . Temper ature (oC) (8) (8) Thermometr y Weekly, before 12.00 AM 14 . Copper (mg/l Cu) < 0.04 < 0.04 Atomic absorption spectrophoto metry Notes Concentration of metals means concentration of their ions in water. (0) This value may be exceeded due to exceptional hydrological or weather conditions. (1) The concentration exceeding this limit value shall not be in breach of these Regulations where it is caused by exceptional hydrological or weather conditions, low 37 water temperatures or reduced nitrification, or if the Regional Environmental Board has received an opinion from the Latvian Fisheries Research Institute stating that such concentrations do not have a deleterious effect on the fish population. (2) Such concentrations are acceptable if the water pH value is 6. Higher concentration of total residual chlorine can be accepted if the pH value is higher. (3) Oil products may be present in water in such quantities only that they: 1) Do not form a visible film on the water surface or coating on the beds of the watercourses and lakes; 2) Do not impart a detectable "hydrocarbon" taste to fish; 3) Do not have a deleterious effect on the fish population. (4) The control shall include visual inspection to identify the presence of the film of oil products on the water surface and taking of soil samples from the river or lake bed, to identify the presence of oil product coating. Such inspections shall be performed on monthly basis. Examination by taste shall be made only where priority fish water pollution by oil products is presumed. (5) Values may be exceeded in the form of minor peaks in the daytime. (6) Artificial pH variations with respect to the unaffected values shall not exceed ±0.5 pH units, within the limits falling between pH 6 and pH 9 if these variations do not 38 increase the harmfulness of other substances present in water. (7) This average concentration of suspended solids shall no be applied if suspended solids contain harmful substances. Particularly high concentrations of suspended solids during floods are acceptable. (8) Temperature requirements for the priority fish waters shall be established on the basis of the following conditions: 1) temperature of priority fish waters measured downstream of the point of thermal discharge (at the edge of the mixing zone) shall not exceed the temperature of unaffected waters by more than: 1.5 oC – in salmonid waters; 3 oC – in cyprinid waters. Thermal discharges creating a higher temperature increase are acceptable if the Latvian Fisheries Research Institute has concluded that such increased water temperature does not have a deleterious effect on the fish population; 2) temperature of priority fish waters downstream of the point of thermal discharge (at the edge of mixing zone) shall not exceed the following values: (0) 21.5 oC – in salmonid waters; (0) 28 oC - in cyprinid waters; 39 3) if priority fish waters are inhabited by fish species which need cold water for reproduction, the temperature of such waters in the spawning periods due to thermal discharge shall not exceed the following values: (0) 10 oC – in salmonid waters; (0) 10 oC – in cyprinid waters; 4) the established temperature limits may be exceeded in maximum 2% of the total number of measurements. Minister of Environmental Protection and Regional Development V.Makarovs 40 Annex 4 to the Cabinet of Ministers Regulations No 118 of March 12, 2002 Water quality standards for bathing waters N o Parame ter/ unit Guid e value Limit value Method of analysis Minimu m samplin g frequen cy 1 2 3 4 5 6 I Microbiological parameters 1. Entero viruses (PFU in 10 litres) 0 Indication of viruses in at least 3 different tissue cultures (2) 2. Faecal coliform s (E. coli) (in 100 ml) 100 2000 Fermentation on multi-stage solution tubes. Subculturing of the positive tubes on a Fortnig htly (1) 41 culture media. Count according to MPN or membrane filtration and cultivation on appropriate medium. Sub cultivation and identification of suspicious colonies. Incubation t° is variable for total coliforms and faecal coliforms. LVS EN ISO 9308-1:2001 LVS ISO 9308 2:1990 3. Intestine enteroco ccus (in 100 ml) 100 Count according to MPN or membrane filtration. Cultivation on suitable medium. (2) 42 LVS EN ISO 7899-1:1998 LVS EN ISO 7899-2:2001 4. Total coliform s (in 100 ml) 500 10,00 0 Same as for faecal coliforms Fortnig htly (1) 43 5. Salmone lla (in 1000 ml) 0 Concentration by membrane filtration. Inoculation on a standard medium. Proliferation – subculturing on isolating agar – identification. LVS ISO 6340:1995 (2) II Physical and chemical parameters 6. Ammoni a (mg/l NH4+) Absorption spectrophotomet ry, Nesler’s or indophenol blue method (3) 7. Transpar ency (m) 2 1(0) Secchi disc Fortnig htly (1) 8. Cyanide s (mg/l Absorption spectrophotomet ry using specific (2) 44 CN-) reagents 9. Phenols (phenol index) (mg/l C6H5OH) < 0.005 No specif ic odour < 0.005 Control of the presence of the specific phenol odour or absorption spectrophotomet ry with 4 aminoantipyrene (4 AAP) Fortnig htly (1), (2) 1 0. Dissolve d oxygen (saturatio n % O2 ) 80 120 Winkler’s method or electrometric method (oxygen meter) (2) 1 1. Nitrogen Kjeldahl (mg/l N) Kjeldahl’s method (3) 1 2. Colour (Pt/Co scale) No abnor mal chang es (0) Visual inspection or photometry with standards on the Pt/Co scale Fortnig htly (1), (2) 1 3. Mineral oils (mg/l) < 0.3 No odour and Visual inspection or extraction, using Fortnig htly (1), (2) 45 no floati ng film an adequate volume and weighing the dry weight. Extraction by an appropriate solvent and identification by infrared spectrophotomet er or gas chromatograph. 46 1 4. Nitrates and phosphat es (mg/l NO3 mg/l PO43-) Atomic absorption spectrophotomet ry, using a specific reagents (3) 1 5. Floating materials (e.g. wood, plastic, rubber, bottles, tar, wood chips, rubbish) Abse nce Visual inspection Fortnig htly (1) 1 6. pH (pH units) 6 9(0) Electrometry with calibration at pH 7 and 9 (2) 1 7. Pesticide s (4) (mg/l) Extraction with appropriate solvents and chromatographic (2) 47 determination 1 8. Heavy metals: Arsenic (As), Cadmiu m (Cd), Chromiu m (Cr (VI)), Lead (Pb), Mercury (Hg) (mg/l) Atomic absorption (possibly after extraction concentration) (2) 1 9. Surface active substanc es reacting with methylen e blue (mg/l (Na dodecil benzosul < 0.3 No lastin g foam Visual inspection or absorption spectrophotomet ry with methylene blue Fortnig htly (1), (2) 48 phonate)) Notes Concentration of metals means concentration of their ions in water. (0) Under abnormal hydrological and weather conditions the Public Health Agency may permit deviations from these values if such deviations do not create hazard for public health. (1) When the monitoring results for the previous years indicate that water quality is appreciably higher than the requirements of this Annex and when no new factor likely to lower water quality has appeared, the Public Health Agency may reduce the sampling frequency by a factor of 2. (2) The Public Health Agency shall control this parameter if this substance may be present in water or in the case of deterioration of the bathing water quality. (3) The Public Health Agency shall control the concentration of this substance in the case of actual or eventual eutrophication of waters. (4) "Total pesticides" means the sum of pesticides identified and measured during the monitoring process. Pesticides include organic insecticides, organic herbicides, organic fungicides, organic 49 nematocides, organic agricides, organic rhodenticides, organic slimicides, related products (including growth regulators), as well as their most important metabolites and degradation and reaction products. Only those pesticides, which are likely to be present in the respective water body, shall be controlled. Minister of Environmental Protection and Regional Development V.Makarovs 50 Annex 5 to the Cabinet of Ministers Regulations No 118 of March 12, 2002 Surface waters used for the abstraction of drinking water and their categories N o Name Samplin g point Treatment methods Categ ory 1. Daugava, Water treatment station "Daugava " Water treatmen t station "Daugav a", samplin g room Ozonation (twice), coagulation/flocc ulation/ sedimentation, pH-adjustment (twice), filtration (twice), disinfection A3 2. Lakes: Mazais Baltezers Water samplin g Artificial ground water recharge by natural water A1 51 , Sudrabez ers, Venču lake, Sekšu lake, Water pumping station "Baltezer s" platform before infiltrati on water pumping station infiltration and disinfection Minister of Environmental Protection and Regional Development V.Makarovs 52 Annex 6 to the Cabinet of Ministers Regulations No 118 of March 12, 2002 Water quality standards for surface waters used for the abstraction of dinking water N o Paramete r/unit A1 A2 A3 Gui de valu e Li mit valu e Gui de valu e Lim it valu e Gui de valu e Lim it valu e 1 2 3 4 5 6 7 8 1. Adsorbabl e organic halogens (AOX) (µg/l) (1) (1) (1) 2. Aluminiu m (mg/l Al) 0.2 0.5 0.5 3. Ammonia (mg/l NH4+) 0.0 5 0.5 1 1.5 2 4(0) 53 N o Paramete r/unit A1 A2 A3 Gui de valu e Li mit valu e Gui de valu e Lim it valu e Gui de valu e Lim it valu e 4. Antimony (mg/l Sb) 0.0 05 0.0 05 0.0 05 5. Arsenic (mg/l As) 0.0 1 0.0 5 0.0 5 0,1 6. Barium (mg/l Ba) 0.1 1 1 7. Benzene (mg/l C6H6) 0.0 01 0.0 01 0.0 02 8. Biochemi cal oxygen demand (BOD5) (at 20 ºC, without nitrificatio n) (mg/l O2) < 3 < 5 < 7 9. Boron (mg/l B) 1 1 1 1 1 Cyanides 0.0 0.0 0.0 54 N o Paramete r/unit A1 A2 A3 Gui de valu e Li mit valu e Gui de valu e Lim it valu e Gui de valu e Lim it valu e 0. (mg/l CN ) 5 5 5 1 1. Zinc (mg/l Zn) 0.5 3 1 5 1 5 1 2. Iron (mg/l Fe) 0.1 0.2 1 2 1 1 3. Mercury (mg/l Hg) 0.0 005 0.0 01 0.0 005 0.0 01 0.0 005 0.0 01 1 4. Conductiv ity (µS/cm) 100 0 100 0 100 0 55 1 5. Faecal coliforms (in 100 ml) 20 200 0 200 00 1 6. Intestine enterococc us (in 100 ml) 20 100 0 100 00 1 7. Phenols (phenol index) (mg/l) 0.0 01 0.0 01 0.0 05 0.0 1 0.1 1 8. Fluorides(2 ) (mg/l F-) 0.7 1 1.5 0.7 1.7 0.7 1.7 1 9. Phosphate s (mg/l P2O5) 0.1 8 0.3 0.3 2 0. Chlorides (mg/l Cl-) 200 250 200 200 2 1. Dissolved oxygen, rate of saturation (% O2) > 70 > 50 > 30 2 Cadmium 0.0 0.0 0.0 0.0 0.0 0.0 56 2. (mg/l Cd) 01 05 01 05 01 05 2 3. Total chromium (mg/l Cr) 0.0 5 0.0 5 0.0 5 2 4. Total coliforms at 37 ºC (in 100 ml) 50 500 0 500 00 2 5. Total organic carbon (TOC) (mg/l C) (1) 2 6. Total pesticides (3) (mg/l) 0.0 05 0.0 05 0.0 05 2 7. Total suspended solids (mg/l) 25 2 8. Coloration (after simple filtration) (Pt/Co scale) 10 20(0 ) 50 10 0(0) 50 200 (0) 57 2 9. Chemical oxygen demand (COD) (mg/l O2) 30 3 0. Manganes e (mg/l Mn) 0.0 5 0.0 5 0.1 1 3 1. Petroleum hydrocarbo ns (mg/l) 0.0 5 0.2 0.5 1 3 2. Sodium (mg/l Na) 200 20 0 200 3 3. Nickel (mg/l Ni) 0.0 2 0.0 2 0.0 2 3 4. Nitrates (mg/l NO3 ) 25 50(0 ) 50( 0) 50(0 ) 3 5. Nitrites (mg/l NO2 ) 0.5 0.5 0.5 3 6. Permanga nate index (mg/l O2) 5.0 10 20 3 Total 0.0 0.0 0.0 58 7. pesticides (3), (4) (mg/l) 01 01 01 3 8. pH (pH units) 6.5 8.5 5.5 9 5.5 9 3 9. Polycyclic aromatic hydrocarbo ns (PAH)(5) (mg/l) 0.0 001 0.0 002 0.0 01 4 0. Salmonell a (in 1000 ml and 5000 ml) 0 0 4 1. Selenium (mg/l Se) 0.0 1 0.0 1 0.0 1 4 2. Nitrogen, by Kjeldahl’s method, except NO3- (mg/l N) 1 2 3 4 3. Odour (dilution factor at 25 ºC) 3 10 20 59 4 4. Sulphates (mg/l SO42 ) 150 250 150 25 0(0) 150 250 (0) 4 5. Lead (mg/l Pb) 0.0 1 0.0 5 0.0 5 4 6. Temperatu re (ºC) 22 25(0 ) 22 25( 0) 22 25(0 ) 4 7. Tetrachlor oethylene (tetrachlor oethene) and trichloroet hylene (trichloroet hene)(6) (mg/l) 0.0 01 0.0 01 0.0 01 4 8. Copper (mg/l Cu) 0.0 2 0.0 5(0) 0.0 5 1 4 9. Surface act ive substances reacting with methylene blue (mg/l (Na 0.2 0.2 0.5 60 dodecil benzosulph onate)) Notes Concentration of metals means concentration of their ions in water. (0) The value may be waived under exceptional hydrological or weather conditions. (1) No abnormal changes. (2) Highest acceptable concentration of fluorides at high and low average yearly temperature. (3) "Total pesticides" means the sum of pesticides identified and measured during the monitoring process. Pesticides include organic insecticides, organic herbicides, organic fungicides, organic nematocides, organic agricides, organic rhodenticides, organic slimicides, related products (including growth regulators), as well as their most important metabolites and degradation and reaction products. Only those pesticides, which are likely to be present in the respective water body, shall be controlled. (4) This limit value applies to each individual pesticide. The limit value for aldrin, dieldrin, heptachlor and heptachlor epoxide is 0.030 µg/l (for 61 all waters). (5) The sum of concentrations of benzo(b)fluoranthene, benzo(k)fluoranthene, benzo(g, h, i)perylene, indeno(1, 2, 3-c, d)pyrene. (6) The limit values apply to the sum of concentrations of the both specified compounds. Minister of Environmental Protection and Regional Development V.Makarovs 62 Annex 7 to the Cabinet of Ministers Regulations No 118 of March 12, 2002 Groups of parameters and sampling frequencies for surface waters used for the abstraction of drinking water I Groups of parameters for which sampling frequencies are specified in Table 2 Table 1 Group I Group II Group III Ammonium Aluminium Adsorbable organic halogenides Biochemical oxygen demand (BOD5) Zinc Arsenic Conductivity Iron Barium Phosphates Faecal coliforms Benzene Chlorides Phenols Boron 63 Dissolved oxygen saturation rate Total coliforms Cyanides Total suspended solids Manganese Mercury Coloration Nitrogen by Kjeldahl’s method Intestine enterococcus Chemical oxygen demand (COD) Sulphates Fluorides Sodium Copper Cadmium Nitrates Surface active substances Total chromium Nitrites Petroleum hydrocarbons Permanganate index Nickel pH Pesticides Odour Polycyclic aromatic hydrocarbons (PAO) Temperature Salmonella Selenium 64 Lead Tetrachloroeth ylene and trichlorethylene II Minimum annual sampling frequency Table 2 Popul ation served Surface water, category A1 Surface water, category A2 Surface water, category A3 Gro up I (GI ) G II G III G I G II G III G I G II G III < 10,000 (*) (*) (*) (* ) (*) (*) 2 1 1 > 10,000 < 30,000 1 1 (*) 2 1 (*) 3 1 1 > 30,000 < 100,00 0 2 1 (*) 4 2 1 6 2 1 65 > 100,00 0 3 2 (*) 8 4 1 1 2 4 1 Note (*) Sampling frequency for each sampling point shall be established by the institution that issues a Category A or B permit for polluting activity or a water use permit. Minister of Environmental Protection and Regional Development V.Makarovs 66 Annex 8 to the Cabinet of Ministers Regulations No 118 of March 12, 2002 Reference methods of analysis for surface waters used for the abstraction of drinking water N o Paramet er/ unit Limit of detect ion Pre cisio n Accur acy Method of analysis Materials recommended for the container 1 2 3 4 5 6 7 1. Alumini um 0.02 10 % 10 % Atomic absorption spectrophotometry 67 N o Paramet er/ unit Limit of detect ion Pre cisio n Accur acy Method of analysis Materials recommended for the container (mg/l Al) Molecular absorption spectrophotometry 2. Ammon ium (mg/l NH4+) 0.01(1 ) 0.1(2) 0.0 3(1) 10 %(2) 0.03(1 ) 10 %(2) Molecular absorption spectrophotometry with flow analysis Molecular absorption spectrophotometry 3. Antimo ny (mg/l Sb) 0.000 5 25 % 25 % - Atomic absorption spectrophotometry 4. Arsenic (3) 0.002 (1) 10 % 10 % - Atomic absorption spectrophotometry 68 N o Paramet er/ unit Limit of detect ion Pre cisio n Accur acy Method of analysis Materials recommended for the container (mg/l As) 0.01(4 ) Atomic absorption spectrophotometry Molecular absorption spectrophotometry 5. Barium (3) (mg/l Ba) 0.02 15 % 30 % - Atomic absorption spectrophotometry 6. Benzene (mg/l C6H6) 0.000 1 25 % 25 % - Gas chromatography 69 N o Paramet er/ unit Limit of detect ion Pre cisio n Accur acy Method of analysis Materials recommended for the container 7. Bioche mical oxygen demand (BOD5) at 20 oC, without nitrificat ion (mg/l O2) 2 1,5 2 - Determination of the oxygen demand before and after five days incubation LVS EN 1899-1,2:1998 8. Boron (3) (mg/l B) 0.1 10 % 10 % - Atomic absorption spectrophotometry Materials that do not contain 70 N o Paramet er/ unit Limit of detect ion Pre cisio n Accur acy Method of analysis Materials recommended for the container Molecular absorption spectrophotometry significant amounts of boron 9. Cyanide s (5) (mg/l CN- ) 0.01 20 % 30 % - Molecular absorption spectrophotometry 1 0. Zinc (3) (mg/l Zn) 0.01(1 ) 10 % 20 % - Atomic absorption spectrophotometry 0.02 10 20 % - Atomic absorption 71 % spectrophotometry Molecular absorption spectrophotometry 1 1. Iron (mg/l Fe) 0.02 10 % 10 % - Atomic absorption spectrophotometry Molecular absorption spectrophotometry 1 2. Mercury (3) (mg/l Hg) 0.000 1 0.000 2(4) 20 % 20 % - Atomic absorption spectrophotometry (cold vaporization) 1 3. Conduct ivity at 20 oC (µS/cm) – 5 % 10 % - Conductometry 1 4. Faecal coliform s (E.coli) 2(1) 200(6) General guidelines for counting of cultivated micro organisms LVS Sterilised glass, plastic 72 (in 100 ml) ISO 8199:1988 Membrane filtration LVS EN ISO 9308 1:2001 Multiple solution (MPN) method LVS ISO 9308- 2:1990 Micro method LVS EN ISO 9308-3:1998 1 5. Intestine enteroco ccus (in 100 ml) 2(1) 200(6) Membrane filtration LVS EN ISO 7899 2:2001 Sterilised glass, plastic 1 6. Phenols (phenol index) (mg/l C6H5OH 0.000 5 0.001( 7) 0.0 005 30 % 0.000 5 50 % Spectrophotometry with flow analysis Molecular absorption spectrophotometry Glass 73 ) 1 7. Fluoride s (mg/l F- ) 0,05 10 % 10 % -Molecular absorption spectrophotometry, if necessary, after distillation Ion selective electrodes Liquid chromatography 1 8. Phospha tes (mg/l PO43- ) 0.02 10 % 20 % - Molecular absorption spectrophotometry Liquid chromatography 74 1 9. Chlorid es (mg/l Cl ) 10 10 % 10 % - Titration (Mohr’s method) Liquid chromatography Molecular absorption spectrophotometry 2 0. Dissolv ed oxygen, satura tion (% O2) 5 10 % 10 % - Winkler’s method Electrometric method Glass 2 1. Cadmiu m (3) (mg/l Cd) 0.000 2 0.001( 4) 10 % 10 % - Atomic absorption spectrophotometry Polarography 2 Total 0.01 10 10 % - Atomic absorption 75 2. chromiu m (3) (mg/l Cr) % spectrophotometry Molecular absorption spectrophotometry 2 3. Total coliform s (in 100 ml) 5(1) 500(6) Membrane filtration LVS EN ISO 9308 1:2001 General guidelines for counting of cultivated micro organisms LVS ISO 8199:1988 Multiple solution (MPN) method LVS ISO 9308- 2:1990 Sterilised glass, plastic 2 4. Total organic carbon (TOC) Oxidation of organic carbon by combustion, determination of CO2 by IR Materials not containing reference components and 76 (mg/l C) spectrophotometry, conductivity, thermal conductivity, CO2 sensors not reducing their concentration in the sample 2 5. Total pesticide s(3, 8, 9) (mg/l) 0.000 125 25 % 25 % - Gas chromatography Liquid chromatography Glass 2 6. Total suspende d solids (mg/l) – 5 % 10 % - Gravimetric analysis LVS EN 872:1996 2 7. Colorati on (after simple filtration ) (Pt/Co 5 10 % 20 % - Filtration through glass fibre membrane and photometric method using Pt/Co scale Visual method 77 scale) 2 8. Chemica l oxygen demand (COD) (mg/l O2) 15 20 % 20 % - Potassium dichromate method Titration Electrochemical method 2 9. Mangan ese (mg/l Mn) 0.005 0.01(1) 10 % 10 % 10 % 20 % Atomic absorption spectrophotometry 0.02(2 ) 10 % 20 % - Atomic absorption spectrophotometry Molecular absorption spectrophotometry 3 0. Petroleu m hydrocar 0.01 0.04(2) 20 % 30 % - Gas chromatography Infrared spectrophotometry Glass 78 bons (mg/l) 3 1. Sodium (mg/l Na) 20 10 % 10 % - Flame emission spectrophotometry 3 2. Nickel (mg/l Ni) 0.002 10 % 10 % - Atomic absorption spectrophotometry 3 3. Nitrates (mg/l NO3-) 2 10 % 10 % - Reduction in Cd column and spectrophotometric detection Molecular absorption spectrophotometry Liquid chromatography 3 4. Nitrites (mg/l 0.000 05 10 % 10 % - Molecular absorption spectrophotometry 79 NO2-) 3 5. Perman ganate index (10) (mg/l O2) 0,5 25 % 25 % - Titration with KMnO4 3 6. Total pesticide s(9) (mg/l) 0.000 025 0.000 0075 (11) 25 % 25 % - Gas chromatography Liquid chromatography Glass 3 7. pH (pH units) 0,1 0,2 - Electrometry 80 3 8. Polycyc lic aromatic hydrocar bons (3, 12) (PAO) (mg/l) 0.000 025 50 % 50 % - Gas chromatography Liquid chromatography Glass or aluminium 39 . Salmone lla (13) (in 5000 ml and in 1000 ml) LVS ISO 6340:1995 Concentration by filtration of large samples (1.0 - 5.0 l) through a membrane filter (0.45mm). The cultivation of the concentrated sample in liquid and/or solid selective medium, Sterilised glass, plastic 81 isolation of typical colonies and introduction into different media, identification by biochemical and serological tests. 4 0. Seleniu m (3) (mg/l Se) 0.001 10 % 10 % - Atomic absorption spectrophotometry 41 . Nitrogen by Kjeldahl ’s method, except for NO2 0.3 0.5 0.5 - Mineralisation, distillation by Kjeldahl’s method and ammonium determination by means of molecular absorption spectrophotometry or 82 and NO3 (mg/l N) titration By calculation, identifying total nitrogen and specific forms of nitrogen 4 2. Odour (Dilution factor at 25 oC) – – – - By successive dilutions Glass 4 3. Sulphate s (mg/l SO42- ) 10 10 % 10 % - Gravimetry Liquid chromatography 4 4. Lead (3) (mg/l Pb) 0.00 1 10 % 10 % - Atomic absorption spectrophotometry Polarography 4 Tempera – 0.5 1 - Thermometry 83 5. ture (oC) (Measured in situ at the time of sampling without previous processing) 4 6. Tetrachl oro ethylene (tetrachlo ro ethene) and trichloro ethylene (tricloroet hene) (mg/l) 0.00 05 25 %(14) 25 %(14) Gas chromatography 4 7. Copper (3) 0.00 5 10 % 20% - Atomic absorption spectrophotometry 84 (mg/l Cu) - Polarography 0.02( 15) 10 % 20 % - Atomic absorption spectrophotometry Molecular absorption spectrophotometry Polarography 4 8. Surface active substance s reacting with methylen e blue (mg/l Na dodecilbe nzo sulphonat e) Molecular absorption spectrophotometry LVS ISO 7875- 1:1996 LVS ISO 7875- 2:1984 85 Notes (1) For Category A1 waters (guide value). (2) For Category A2 and A3 waters. (3) If the samples contain so much suspended matter as to require special prior treatment, the accuracy values specified in this table may be exceeded in such exceptional cases. In such cases, the values shall be considered as targets. These samples shall be treated in a way so as to ensure that the analysis covers the largest possible quantity of the monitored substances. (4) For Category A1, A2 and A3 waters (limit value). (5) Reference method for identification of all cyanides in all possible forms. (6) For Category A2 and A3 waters (guide value). (7) For Category A2 waters (limit value) and for Category A3 waters. (8) "Total pesticides" means the sum of pesticides identified and measured during the monitoring process. Pesticides include organic insecticides, organic herbicides, organic fungicides, organic nematocides, organic agricides, organic 86 rhodenticides, organic slimicides, related products (including growth regulators), as well as their most important metabolites and degradation and reaction products. Only those pesticides, which are likely to be present in the respective water body, shall be controlled. (9) Accuracy, precision and limit of detection of the reference method shall apply to each individual pesticide and depends on the properties of the pesticide concerned. (10) Oxidation shall be carried out for 10 minutes at 100 ºC temperature under acid conditions using permanganate. (11) The limit of detection for aldrin, dieldrin, heptachlor and heptachlor epoxide is 0.0000075 mg/l. (12) The sum of concentrations of benzo(b)fluoranthene, benzo(k)fluoranthene, benzo(g, h, i)perylene, indeno(1, 2, 3-c, d)pyrene. (13) Absence in 5000 ml (guide value for Category A1 waters) and absence in 1000 ml (guide value for Category A2 waters). (14) Accuracy, precision and limit of detection of the method shall apply to the individual substances specified at 50 % of the value specified in Annex 6. (15) For Category A3 waters. 87 Minister of Environmental Protection and Regional Development V.Makarovs 88 Annex 9 to the Cabinet of Ministers Regulations No 118 of March 12, 2002 Water quality standards for groundwater used for the abstraction of drinking waters and requirements for monitoring of such waters I Water quality standards for groundwater used for the abstraction of drinking water Table 1 No Parameter Unit Limit value Principle of the method of measurement 1 2 3 4 5 1. Ammoniu m mg/l NH4+ 0.50 Spectrophotome try with flow analysis Molecular absorption spectrophotome 89 No Parameter Unit Limit value Principle of the method of measurement try 2. Antimony µg/l Sb 5.0 Atomic absorption spectrophotome try 3. Arsenic µg/l As 10 Atomic absorption spectrophotome try 4. Benzo (a) pyrene µg/l 0.010 Chromatograph y 5. Benzene µg/l C6H6 1.0 Chromatograph y 6. Boron mg/l B 1.0 - Atomic absorption spectrophotome try Molecular absorption spectrophotome try 7. Cyanides µg/l CN 50 Molecular absorption spectrophotome 90 No Parameter Unit Limit value Principle of the method of measurement try 8. Iron µg/l Fe 200 - Molecular absorption spectrophotome try Atomic absorption spectrophotome try 9. Mercury µg/l Hg 1.0 Atomic absorption spectrophotome try 10 . Conductiv ity µS/cm at 20 °C 2500 Electrometric analysis 91 11 . Fluorides mg/l F 1.5 - Molecular absorption spectrophotome try Liquid chromatography 12 . Chlorides( 1) mg/l Cl 250 - Titration Molecular absorption spectrophotome try Liquid chromatography 13 . Chlorinat ed solvents(2) µg/l 10 Chromatograph y 14 . Chromiu m µg/l Cr 50 Atomic absorption spectrophotome try 15 . Manganes e µg/l Mn 50 - Atomic absorption spectrophotome try Molecular absorption 92 spectrophotome try 16 . Cadmium µg/l Cd 5.0 Atomic absorption spectrophotome try 17 . Sodium mg/l Na 200 Flame emission spectrophotome try 18 . Nickel µg/l Ni 20 Atomic absorption spectrophotome try 19 . Nitrates (3) mg/l NO3 50 Spectrophotome try with flow analysis Molecular absorption spectrophotome try 20 . Nitrites mg/l NO2 0.50 Spectrophotome try with flow analysis Molecular absorption 93 spectrophotome try 21 . Permanga nate index mg O2/l 5.0 Titration 22 . Pesticides (4) µg/l 0.10 Chromatograph y 23 . Pesticides (total)(5) µg/l 0.50 Chromatograph y 24 . pH pH units > 6,5 and < 9.5 Potentiometry 25 . Polycycli c aromatic hydrocarb ons (PAH)(6) µg/l 0.10 Chromatograph y 26 . Selenium µg/l Se 10 Atomic absorption spectrophotome try 27 . Sulphates mg/l SO42 250 - Liquid chromatography Gravimetric analysis turbidimetric analysis 94 28 . Lead µg/l Pb 10 Atomic absorption spectrophotome try 29 . Copper mg/l Cu 2.0 Atomic absorption spectrophotome try Notes Concentration of metals means concentration of their ions in water. (1) Water shall not have corroding impact. (2) Chlorinated solvents are tetrachloroethylene (tetrachloroethene) and trichloroethylene (trichloroethene). The limit value shall apply to sum of concentrations of both individual substances. (3) The following conditions shall be met:[ (nitrates (NO3-) concentration in mg/l]/50 + [nitrites (NO2-) concentration in mg/l]/3 < 1. The concentration of nitrites after water treatment shall not exceed 0.1 mg/l. (4) The limit value shall apply to each individual pesticide. The limit value for aldrin, dieldrin, heptachlor and heptachlor epoxide is 0.030 µg/l. (5) "Total pesticides" means the sum of pesticides 95 identified and measured during the monitoring process. Pesticides include organic insecticides, organic herbicides, organic fungicides, organic nematocides, organic agricides, organic rhodenticides, organic slimicides, related products (including growth regulators), as well as their most important metabolites and degradation and reaction products. (6) The sum of concentrations of benzo(b)fluoranthene, benzo(k)fluoranthene, benzo(g, h, i)perylene, indeno(1, 2, 3-c, d)pyrene. II Accuracy, precision and limit of detection of the methods of analysis Table 2 No Parameter Accuracy, % of limit value Precisio n, % of limit value Limit of detection, % of limit value 1. Ammonium 10 10 10 2. Antimony 25 25 25 96 3. Arsenic 10 10 10 4. Benzo (a) pyrene 25 25 25 5. Benzene 25 25 25 6. Boron 10 10 10 7. Cyanides (1) 10 10 10 8. Iron 10 10 10 9. Mercury 20 10 20 10 . Conductivit y 10 10 10 11 . Fluorides 10 10 10 12 . Chlorides 10 10 10 13 . Chlorinated solvents (2) 25 25 10 14 . Chromium 10 10 10 15 . Cadmium 10 10 10 97 16 . Manganese 10 10 10 17 . Sodium 10 10 10 18 . Nickel 10 10 10 19 . Nitrates 10 10 10 20 . Nitrites 10 10 10 21 . Permangan ate index (3) 25 25 10 22 . Pesticides (4) 25 25 25 23 . Pesticides (total) 25 25 25 24 . pH (5) (5) 25 . Polycyclic aromatic hydrocarbo ns (6) 25 25 25 26 . Selenium 10 10 10 27 . Sulphates 10 10 10 98 28 . Lead 10 10 10 29 . Copper 10 10 10 Notes (1) Identification of all cyanides in all possible forms. (2) Precision, accuracy and limit of detection shall apply to each of chlorinated solvents at 50% concentration of the value specified in Table 1. (3) Oxidation shall be carried out for 10 minutes at 100 ºC temperature under acid conditions using permanganate. (4) Accuracy, precision and limit of detection of the reference method shall apply to each individual pesticide and depends on the properties of the pesticide concerned. (5) pH shall be measured by equipment that ensures accuracy of 0.2 pH units and precision of 0.2 pH units. (6) Precision, accuracy and limit of detection shall apply to each individual substance at 25% concentration of the value indicated in Table 1. 99 Minister of Environmental Protection and Regional Development V.Makarovs