Water Services (Drinking Water Standards for New Zealand) Regulations 2022

Water Services (Drinking Water Standards for New Zealand) Regulations 2022 Rt Hon Dame Helen Winkelmann, Administrator of the Government Order in Council At Wellington this 7th day of June 2022 Present: Her Excellency the Administrator of the Government in Council These regulations are made under section 47 of the Water Services Act 2021— (a) on the advice and with the consent of the Executive Council; and (b) on the recommendation of the Minister of Local Government; and (c) following consultation in accordance with section 53 of that Act. Contents Page 1 Title 2 2 Commencement 2 3 Interpretation 2 4 Drinking Water Standards 2 5 Revocation 2 Schedule Drinking Water Standards for New Zealand 3 2022/168 1 http://legislation.govt.nz/pdflink.aspx?id=LMS374727 http://legislation.govt.nz/pdflink.aspx?id=LMS374529 http://legislation.govt.nz/pdflink.aspx?id=LMS374733 Regulations 1 Title These regulations are the Water Services (Drinking Water Standards for New Zealand) Regulations 2022. 2 Commencement These regulations come into force on 14 November 2022. 3 Interpretation In these regulations, unless the context otherwise requires,— determinand means a substance or characteristic that is determined or estima‐ ted in drinking water MAV means maximum acceptable value. 4 Drinking Water Standards (1) The determinands listed in the first column of each table in the Schedule must not exceed the applicable maximum acceptable value specified in the second column. (2) The maximum acceptable values in the second column of each table in the Schedule must be calculated in accordance with the notes (if any) set out in the third column. 5 Revocation The Drinking-water Standards for New Zealand 2005 (revised 2018) are revoked. r 1 Water Services (Drinking Water Standards for New Zealand) Regulations 2022 2022/168 2 Schedule Drinking Water Standards for New Zealand r 4 Table 1 Maximum acceptable values for microbiological determinands Determinand Maximum acceptable value Notes Escherichia coli Less than 1 in 100 mL of sample Total pathogenic protozoa Less than 1 verified infectious (oo)cyst per 100 L of sample Table 2 Maximum acceptable values for inorganic determinands Determinand Maximum acceptable value (mg/L unless otherwise stated) Notes Aluminium 1 Antimony 0.02 Arsenic 0.01 Barium 1.5 Boron 2.4 Bromate 0.01 Cadmium 0.004 Chlorate 0.8 Chlorine 5 Expressed in mg/L as Cl2 Chlorite 0.8 Chromium 0.05 Total chromium content Copper 2 Cyanide 0.6 Cyanogen chloride 0.4 Fluoride 1.5 Lead 0.01 Manganese 0.4 Mercury 0.007 Inorganic mercury only Monochloramine 3 Expressed in mg/L as Cl2 Nickel 0.08 Nitrate, short-term 50 Expressed in mg/L as NO3, or 11.3 mg/L as NO3-N Nitrite, short-term 3 Expressed in mg/L as NO2 Nitrate and nitrite Σ ratio < 1 The sum of the ratio of the concentrations of nitrate and nitrite to each of their respective MAVs must not exceed 1 Perchlorate 0.08 Selenium 0.04 2022/168 Water Services (Drinking Water Standards for New Zealand) Regulations 2022 Schedule 3 Determinand Maximum acceptable value (mg/L unless otherwise stated) Notes Uranium 0.03 Table 3 Maximum acceptable values for organic determinands Determinand Maximum acceptable value (mg/L unless otherwise stated) Notes Acrylamide 0.0005 Alachlor 0.02 Aldicarb 0.01 Aldrin + dieldrin 0.00004 The sum of both, not individually Anatoxins (includes congeners anatoxin-a, homoanatoxin-a, dihydroanatoxin-a, dihydrohomoanatoxin-a) 0.006 Expressed as anatoxin-a toxicity equivalents Atrazine 0.1 Sum of atrazine and its metabolites Azinphos methyl 0.1 Benzene 0.01 Benzo(α)pyrene 0.0007 Bromacil 0.4 Bromodichloromethane 0.06 Bromoform 0.1 Carbofuran 0.008 Carbon tetrachloride 0.005 Chlordane 0.0002 Chloroform 0.4 Chlorotoluron 0.04 Chlorpyriphos 0.04 Cyanazine 0.0007 Cylindrospermopsin 0.0008 Expressed as cylindrospermopsin toxicity equivalents 2,4-D 0.04 2,4-DB 0.1 DDT + isomers 0.001 Sum of all isomers Di(2-ethylhexyl)phthalate 0.009 1,2-dibromo-3 chloropropane 0.001 Dibromoacetonitrile 0.08 Dibromochloromethane 0.15 1,2-dibromoethane 0.0004 Dichloroacetic acid 0.05 Dichloroacetonitrile 0.02 1,2-dichlorobenzene 1.5 Schedule Water Services (Drinking Water Standards for New Zealand) Regulations 2022 2022/168 4 Determinand Maximum acceptable value (mg/L unless otherwise stated) Notes 1,4-dichlorobenzene 0.4 1,2-dichloroethane 0.03 1,2-dichloroethene 0.06 Total of cis and trans isomers Dichloromethane 0.02 1,2-dichloropropane 0.05 1,3-dichloropropene 0.02 Total of cis and trans isomers Dichlorprop 0.1 Dimethoate 0.008 1,4-dioxane 0.05 Diuron 0.02 EDTA (edetic acid) 0.7 Endrin 0.001 Epichlorohydrin 0.0005 Ethylbenzene 0.3 Fenoprop 0.01 Hexachlorobutadiene 0.0007 Hexazinone 0.4 Hydroxytrazine 0.3 Isoproturon 0.01 Lindane 0.002 MCPA 0.8 Mecoprop 0.01 Metalaxyl 0.3 Methoxychlor 0.02 Metolachlor 0.01 Metribuzin 0.07 Microcystins/nodularins 0.001 Expressed as microcystin-LR toxicity equivalents Molinate 0.007 Monochloroacetic acid 0.02 Nitrilotriacetic acid (NTA) 0.2 N-Nitrosodimethylamine (NDMA) 0.0001 Oryzalin 0.4 Oxadiazon 0.2 Pendimethalin 0.02 Pentachlorophenol 0.009 PFHxS + PFOS 0.00007 PFHxS = perfluorohexane sulfonate PFOS = perfluorooctane sulfonate MAV is the sum of both PFOA 0.00056 PFOA = perfluorooctanoic acid Picloram 0.2 Pirimiphos-methyl 0.1 Primisulfuron-methyl 0.9 2022/168 Water Services (Drinking Water Standards for New Zealand) Regulations 2022 Schedule 5 Determinand Maximum acceptable value (mg/L unless otherwise stated) Notes Procymidone 0.7 Propazine 0.07 Pyriproxyfen 0.4 Saxitoxins 0.003 Expressed as saxitoxin-equivalents Simazine 0.002 Sodium dichloroisocyanurate (as cyanuric acid) 40 Styrene 0.03 2,4,5-T 0.01 Terbacil 0.04 Terbuthylazine 0.008 Tetrachloroethene 0.05 Thiabendazole 0.4 Toluene 0.8 Trichloroacetic acid 0.2 Trichloroethene 0.03 2,4,6-trichlorophenol 0.2 Triclopyr 0.1 Trifluralin 0.03 Trihalomethanes (THMs) Σ ratio < 1 The sum of the ratio of the concentration of each THM to its respective MAV must not exceed 1 Vinyl chloride 0.0003 Xylenes (total) 0.6 1080 long-term 0.0035 1080 short-term 0.035 Table 4 Maximum acceptable values for radiological determinands Determinand Maximum acceptable value (Bq/L) Notes Radon 100 Total alpha activity 0.5 Bq/L excluding radon Total beta activity 1 Bq/L excluding potassium-40 Michael Webster, Clerk of the Executive Council. Schedule Water Services (Drinking Water Standards for New Zealand) Regulations 2022 2022/168 6 Explanatory note This note is not part of the regulations, but is intended to indicate their general effect. These regulations, which come into force on 14 November 2022, set the Drinking Water Standards for New Zealand. The standards set limits for the concentration of determinands in drinking water. The limits are referred to as maximum acceptable values (MAVs). The MAVs for any determinand must not be exceeded at any time. Under the Water Services Act 2021, all drinking water suppliers must ensure that the drinking water they supply complies with the standards, regardless of the nature of the source water used or the number of people served by the supply. The standards are based in part on the World Health Organization Guidelines for drinking-water quality: fourth edition incorporating the first and second addenda. The standards revoke and replace the Drinking-water Standards for New Zealand 2005 (revised 2018). Issued under the authority of the Legislation Act 2019. Date of notification in Gazette: 9 June 2022. These regulations are administered by the Department of Internal Affairs. Wellington, New Zealand: Published under the authority of the New Zealand Government—2022 2022/168 Water Services (Drinking Water Standards for New Zealand) Regulations 2022 Explanatory note 7 http://legislation.govt.nz/pdflink.aspx?id=LMS374529 http://legislation.govt.nz/pdflink.aspx?id=DLM7298104