# The Public Water Supplies (Scotland) Amendment Regulations 2022, Schedule 1: SUBSTITUTION OF TABLE B IN SCHEDULE 1 OF THE 2014 REGULATIONS “ TABLE B CHEMICAL PARAMETERS (1) (2) (3) (4) (5) (6) Item Parameter Concentrat-ion or value (maximum) Units of measurement Point of compliance Notes Notes— Note 1: The parametric value of 0.10 μg/l refers to the residual monomer concentration in the water as calculated according to specifications of the maximum release from the corresponding polymer in contact with the water. Note 2: A parametric value of 2.4 mgB/l must be applied when desalinated water is the predominant water source of the supply system concerned or in regions where geological conditions could lead to high levels of boron in groundwater. Note 3: A parametric value of 0.70 mg/l must be applied where a disinfection method that generates this parameter, in particular chlorine dioxide, is used for disinfection of water intended for human consumption. This parametric value applies only if such disinfection methods are used. Note 4: This parameter must be measured only when disinfection methods that can generate HAAs are used for the disinfection of water intended for human consumption. Note 5: This parameter must be measured only in the event of potential blooms in source water (increasing cyanobacterial cell density or bloom forming potential). Note 6: See also regulation 4(2)(c). Note 7: The corresponding parametric value applies to each “other pesticide” individually. Note 8: A parametric value of 30 μg/l must be applied for regions where geological conditions could lead to high levels of selenium in groundwater. Note 9: The sum of concentrations of these two parameters. Note 10: The parametric value of 0.50 μg/l refers to the residual monomer concentration in the water as calculated according to specifications of the maximum release from the corresponding polymer in contact with the water. Part 1 1. Acrylamide 0.10 μg/l Consumer’s tap Note 1 2. Antimony 10 μgSb/l Consumer’s tap 3. Arsenic 10 μgAs/l Consumer’s tap 4. Benzene 1.0 μg/l Consumer’s tap 5. Benzo(a)pyrene 0.010 μg/l Consumer’s tap 6. Bisphenol A 2.5 μg/l Consumer’s tap 7. Boron 1.5 mgB/l Consumer’s tap Note 2 8. Bromate 10 μgBrO3/l Consumer’s tap 9. Cadmium 5.0 μgCd/l Consumer’s tap 10. Chlorate 0.25 mg/l Consumer’s tap Note 3 11. Chlorite 0.25 mg/l Consumer’s tap Note 3 12. Chromium 50 μgCr/l Consumer’s tap 13. Copper 2.0 mgCu/l Consumer’s tap 14. Cyanide 50 μgCN/l Consumer’s tap 15. 1,2-dichloroethane 3.0 μg/l Consumer’s tap 16. Epichlorohydrin 0.10 μg/l Consumer’s tap Note 1 17. Fluoride 1.5 mgF/l Consumer’s tap 18. HAAs 60 μg/l Consumer’s tap Note 4 19. Lead 10 μgPb/l Consumer’s tap 20. Mercury 1.0 μgHg/l Consumer’s tap 21. Microcystin-LR 1.0 μg/l Consumer’s tap Note 5 22. Nickel 20 μgNi/l Consumer’s tap 23. Nitrate 50 mgNO3/l Consumer’s tap Note 6 24. Nitrite 0.50 mgNO2/l Consumer’s tap Note 6 0.10 mgNO2/l Treatment works 25. Pesticides— Aldrin 0.030 μg/l Consumer’s tap Dieldrin 0.030 μg/l Consumer’s tap Heptachlor 0.030 μg/l Consumer’s tap Heptachlor epoxide 0.030 μg/l Consumers’ tap Other pesticide 0.10 μg/l Consumer’s tap Note 7 26. Pesticides: total 0.50 μg/l Consumer’s tap 27. Sum of PFAS 0.1 μg/l Consumer’s tap 28. PAH Total 0.10 μg/l Consumer’s tap 29. Selenium 20 μgSe/l Consumer’s tap Note 8 30. Tetrachloroethene and trichloroethene 10 μg/l Consumer’s tap Note 9 31. THM: Total 100 μg/l Consumer’s tap 32. Uranium 30 μg/l Consumer’s tap 33. Vinyl chloride 0.50 μg/l Note 10 Part 2 34. Aluminium 200 μgAl/l Consumer’s tap 35. Colour 20 mg/1 Pt/Co Consumer’s tap 36. Iron 200 μgFe/l Consumer’s tap 37. Manganese 50 μgMn/l Consumer’s tap 38. Sodium 200 mgNa/1 Consumer’s tap 39. Tetrachlorometh-ane 3 μg/l Consumer’s tap 40. Turbidity 4 NTU Consumer’s tap ” --- Source: https://www.legislation.gov.uk/sdsi/2022/9780111055663/schedule/1 (the official version) Page: https://openlegislation.uk/draft-public-water-supplies-scotland-amendment-regulations-2022/schedule-1 Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.