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The Water Intended for Human Consumption (Private Supplies) (Scotland) Regulations 2017

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PART BChemical parameters

ParameterParametric valueUnitNotes
Acrylamide0.10μg/lNote 1
Antimony5.0μg/l
Arsenic10μg/l
Benzene1.0μg/l
Benzo(a)pyrene0.010μg/l
Boron1.0mg/l
Bromate10μg/lNote 2
Cadmium5.0μg/l
Chromium50μg/l
Copper2.0mg/lNote 3
Cyanide50μg/l
1,2-dichloroethane3.0μg/l
Epichlorohydrin0.10μg/lNote 1
Fluoride1.5mg/l
Lead10μg/lNote 3 and 4
Mercury1.0μg/l
Nickel20μg/lNote 3
Nitrate50mg/l
Nitrite0.50mg/l
0.10mg/lNote 5
Pesticides—Note 6
Aldrin0.030μg/l
Dieldrin0.030μg/l
Heptachlor0.030μg/l
Heptachlor epoxide0.030μg/l
Other pesticide0.10μg/lNote 7
Pesticides: total0.50μg/lNotes 6 and 8
Polycyclic aromatic hydrocarbons0.10μg/lNote 9
Selenium10μg/l
Tetrachloroethene and trichloroethene10μg/lNote 10
Trihalomethanes: total100μg/lNotes 2 and 11
Vinyl chloride0.50μg/lNote 1
Note 1: The parametric value 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: Where possible, without compromising disinfection, an enforcing authority (in relation a supply of water) must strive for a lower value.
Note 3: The parametric value applies to a sample of water obtained by an adequate sampling method at the tap and taken so as to be representative of a weekly average value ingested by consumers of the water. Where appropriate the sampling and monitoring methods must be applied in accordance with any guidelines under Article 7(4) of Council Directive 98/83/EC on the quality of water intended for human consumption(1). Each enforcing authority in relation to the water must take account of the occurrence of peak levels that may cause adverse effects on human health.
Note 4: When implementing measures to achieve compliance with this parametric value, each enforcing authority (in relation supplies of water to premises) must progressively give priority where lead concentrations in the water are highest.
Note 5: The additional parametric value of 0.10 mg/l applies only if the water is subject to treatment to improve its quality. The point of compliance for this additional parametric value is the point at which the water flows out from the treatment works.
Note 6: “Pesticide” means an organic insecticide, organic herbicide, organic fungicide, organic nematocide, organic acaricide, organic algicide, organic rodenticide, organic slimicide, a related product (including growth regulator) and any relevant metabolite, degradation or reaction product. Only those pesticides which are likely to be present in a supply of water need to be monitored.
Note 7: “Other pesticide” means a pesticide other than aldrin, dieldrin, heptachlor and heptachlor epoxide. The parametric value applies to each “other pesticide” individually.
Note 8: The parametric value for this parameter is the sum of all individual pesticides detected and quantified in the monitoring procedure.
Note 9: The parametric value for this parameter is the sum of the concentrations of benzo(b)fluoranthene, benzo(k)fluoranthene, benzo(ghi)perylene and indeno(1,2,3-cd)pyrene.
Note 10: The parametric value for this parameter is the sum of the concentrations of tetrachloroethene and trichloroethene.
Note 11: The parametric value for this parameter is the sum of chloroform, bromoform, dibromochloromethane and bromodichloromethane.
(1)

OJ L 330, 5.12.1998, p.32, as amended by Regulation (EC) No 1882/2003 of the European Parliament and of the Council (OJ L 284, 31.10.2003, p.1), Regulation (EC) No 596/2009 of the European Parliament and of the Council (OJ L 188, 18.7.2009, p.14), Commission Directive (EU) 2015/1787 (OJ L 260, 7.10.2015, p.6) and Corrigendum (OJ L 111, 20.4.2001, p.31).

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