Notification of the Department of Health On Criteria for Recommendation of Drinking Water Quality Surveillance, B.E. 2563 (A.D. 2020)

Notification of the Department of Health On Criteria for Recommendation of Drinking Water Quality Surveillance, B.E. 2563 (A.D. 2020) Whereas it is expedient to revise the Criteria for Recommendation of Drinking Water Quality Surveillance, B.E. 2553 (A.D. 2010) with the current changing situation to set a standard and monitoring for drinking water quality as a standard for the implementation according to the mission of the Department of Health, which will protect the public health of people and support and promote the management of drinking water quality to be appropriate and safe. By virtue of Section 32 of the State Administration Act, B.E. 2534 (A.D. 1991) the Director-General of the Department of Health hereby issues a notification as follows: Clause 1. This Notification shall be referred to as "Notification of the Department of Health on Criteria for Recommendation of Drinking Water Quality Surveillance, B.E. 2563 (A.D. 2020). Clause 2. The Notification of the Department of Health on Criteria for Recommendation of Drinking Water Quality Surveillance, B.E. 2553 (A.D. 2010) dated 13 October 2010 shall be repealed. Clause 3. In this Notification, “Drinking water” means hygienic tap water, surface water, shallow well, groundwater, and rainwater that is intended for drinking, cooking, washing face, brushing teeth, and rinsing mouth. "Reasons which may affect the drinking water quality" means an unexpected event that may affect the drinking water quality in physical, chemical and biological, such as a disaster that has caused by human, accident or an epidemic with water as a medium, etc. "Monitoring of drinking water quality" means examining various characteristics of drinking water in a continuous system to monitor situations related to health by setting and collecting important information for verification in order to know the management constraints and analyze water quality problems which lead to public health operations improvement. The improvement includes performing drinking water safety reviews, and quick and timely implementing health promotion and disease or hazard control. Clause 4. Water quality for general areas shall comply with the drinking water quality criteria according to List Number 1 attached to this Notification and shall monitor the drinking water quality at least once a year. In case of an event that an incident may affect the drinking water quality, the criteria shall be in accordance with List Number 2 attached to this Notification. Monitoring drinking water quality shall be referred to the characteristics or parameters that may pose a health risk according to the water source assessment criteria that may affect the drinking water quality of the relevant authorities. Clause 5. The analysis, the collecting method and the preservation of drinking water quality samples according to Clause 4., paragraph one, shall comply with the methodology in Standard Methods for the Examination of Water and Wastewater Edition 23rd ed., 2017 APHA AWWA WEF. Also, the analysis, the collecting method and the preservation of drinking water quality samples according to Clause 4., paragraph two, shall be in accordance with List Number 2. Announced on the 13th Day of July 2020 Panpimol Wipulakorn Director-General of the Department of Health List Number 1: Drinking water quality standards for general surveillance area PARAMETER Unit of measure Standard Analysis method Physical Turbidity NTU less than 5 Nephelometry Apparent color Platinum-Cobalt less than 15 Spectrophotometric-single-wavelength, visual comparison method pH - 6.5 – 8.5 Electrometric method General chemistry Total dissolved solids mg/l less than 500 TDS dried at 180 degrees Celsius, Gravimetric, Electrometric method Hardness mg/l (as CaCO3) less than 300 EDTA titrimetric Sulfate mg/l less than 250 Turbidimetry, ion chromatography Chloride mg/l less than 250 Argentometry, ion chromatography Nitrate mg/l (as NO3 ) less than 50 Cadmium reduction, ion chromatography, spectrophotometry Nitrite mg/l (as NO2 ) less than 3 Cadmium reduction, ion chromatography, spectrophotometry Fluoride mg/l less than 0.7 ion chromatography, SPADNS colorimetric method, ion-selective electrode Chemical (heavy metal) Iron mg/l less than 0.3 AAS (flame), ICP, spectrophotometry Manganese mg/l less than 0.3 AAS (flame), ICP, spectrophotometry Copper mg/l less than 1 AAS (flame), ICP, spectrophotometry Zinc mg/l less than 3 AAS (flame), ICP, spectrophotometry Chemistry (toxic heavy metals) Lead mg/l less than 0.01 AAS (graphite furnace), ICP Total chromium mg/l less than 0.05 AAS (graphite furnace), ICP Cadmium mg/l less than 0.003 AAS (graphite furnace), ICP Arsenic mg/l less than 0.01 AAS (vapor generation technique), ICP, graphite furnace Mercury mg/l less than 0.001 AAS (vapor generation technique), ICP, Automatic direct mercury analyzer Biological Total coliforms bacteria /100 ml. absent Presence-Absence Test MPN / 100 ml. less than 1.1 MPN method Escherichia coli /100 ml. absent Presence-Absence Test MPN / 100 ml. less than 1.1 MPN method Note: Choose one analysis method for each parameter. List Number 2: Drinking water quality standards in case of event that an incident may affect the drinking water quality PARAMETER Unit of measure Standard Analysis method Industrial area Other toxins Linear Alkyl Benzene Sulfonate mg/l 0.2 APHA,AWWA,WEF, 23rd ed., 2017 Aluminium mg/l 0.2 ICP-MS, spectrophotometry, AAS, ICP Barium mg/l 0.7 AAS (Graphite Furnace), ICP, ICP-MS Beryllium mg/l 0.004 ICP-MS Boron mg/l 2.4 ICP-MS, Electrothermal atomic absorption Cyanide mg/l 0.07 Ion-Selective Electrode, continuous flow injection method, spectrophotometry, cyanide chromatography Nickel mg/l 0.07 ICP-MS Selenium mg/l 0.01 AAS (Vapor Generation Technique), ICP-MS Styrene mg/l 0.02 GC-MS Vinyl chloride mg/l 0.0003 HPLC, GC Volatile organic compounds in the group BTEX Benzene mg/l 0.01 GC-MS, GC/PID Toluene mg/l 0.7 GC-MS, GC/FID Ethylbenzene mg/l 0.3 GC-MS, GC/PID Total Xylenes mg/l 0.5 GC-MS, GC/FID Volatile organic compounds (VOCs) Carbon tetrachloride mg/l 0.004 GC-MS, GC/PID, GC/ELCD 1,2-Dichloroethane mg/l 0.03 GC-MS, GC/PID, GC/ELCD 1,2-Dichloroethene mg/l 0.05 GC-MS, GC/PID, GC/ELCD Dichloromethane mg/l 0.02 GC-MS, GC/PID, GC/ELCD Tetrachloroethene mg/l 0.04 GC-MS, GC/PID, GC/ELCD Trichloroethene mg/l 0.07 GC-MS, GC/PID, GC/ELCD 1.1.1-trichloroethane mg/l 2 GC-MS, GC/PID, GC/ELCD Trihalomethane Chloroform mg/l 0.3 GC Bromo dichloromethane mg/l 0.06 GC Di bromochloromethane mg/l 0.1 GC Bromoform mg/l 0.1 GC Epidemic situation Biological Clostridium perfringens per 100 ml. absent EA 2010, FDA BAM online Pseudomonas aeruginosa per 250 ml. absent ISO 16266 Staphylococcus aureus per 100 ml. absent APHA,AWWA,WEF, 23rd ed. ,2017, FDA BAM online Salmonella spp. per 100 ml. absent ISO 19250, APHA,AWWA,WEF, 23rd ed. ,2017 Shigella spp. per 100 ml. absent ISO 21567 Vibrio cholerae per 100 ml. absent APHA,AWWA,WEF, 23rd ed. ,2017, FDA BAM online Hepatitis A virus per 100 ml. absent Real time PCR, PCR, IgM Norovirus per 100 ml. absent Real time PCR, PCR, ELISA Rotavirus per 100 ml. absent Real time PCR, PCR Cryptosporidium hominis/parvum per 10 L. absent Special staining: Trichrome, Acid-fast stain PCR, Real-time PCR Giardia intestinalis per 10 L. absent wet mount microscopy, concentration method (centrifugation with Formalin and Ethyl acetate.) , Normal and confirmed with Iodine Cyclospora spp. per 10 L. absent Special staining: Trichrome, Acid-fast stain PCR, Real-time PCR Agricultural area Pesticide Atrazine µg/l 2 GC-MS, HPLC Carbofuran µg/l 7 GC with nitrogen-phosphorus detector, reverse-phase HPLC with fluorescence detector Chlorpyrifos µg/l 30 GC, HPLC DDT & metabolites µg/l 1 GC/ECD, GC-MS 2,4-D µg/l 30 GC, HPLC Glyphosate – isopropyl ammonium µg/l 900 GC, HPLC Paraquat dichloride µg/l 10 GC, HPLC Note: Choose one analysis method for each parameter.