The Water Supply (Water Quality) Regulations 2010

Regulations 2 and 4

SCHEDULE 1 PRESCRIBED CONCENTRATIONS AND VALUES

Table A

Microbiological Parameters

Part I: Directive requirements
Item	Parameters	Concentration or Value (maximum)	Units of Measurement	Point of compliance
Note: a Note: Compliance required as to 95% of samples from each service reservoir (regulation 4(6)).
1	Enterococci	0	number/100 ml	Consumers' taps
2	Escherichia coli (E coli)	0	number/100 ml	Consumers' taps
Part II: National requirements
Item	Parameters	Concentration or Value (maximum)	Units of Measurement	Point of compliance
1	Coliform bacteria	0	number/100 ml	Service reservoirsa and water treatment works
2	Escherichia coli (E coli)	0	number/100 ml	Service reservoirs and water treatment works

Table B

Chemical Parameters

Part I: National requirements
Item	Parameters	Concentration or Value (maximum)	Units of Measurement	Point of compliance
Notes:
a 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. This is controlled by product specification.
b See also regulation 6(6).
c See also regulation 4(2)(d).
d See the definition of “pesticides and related products” in regulation 2.
e The parametric value applies to each individual pesticide.
f “Pesticides: Total” means the sum of the concentrations of the individual pesticides detected and quantified in the monitoring procedure.
g The specified compounds are: benzo(b)fluoranthene benzo(k)fluoranthene benzo(ghi)perylene indeno(1,2,3-cd)pyrene. The parametric value applies to the sum of the concentrations of the individual compounds detected and quantified in the monitoring process.
h The parametric value applies to the sum of the concentrations of the individual compounds detected and quantified in the monitoring process.
i The specified compounds are: chloroform bromoform dibromochloromethane bromodichloromethane. The parametric value applies to the sum of the concentrations of the individual compounds detected and quantified in the monitoring process.
1	Acrylamide	0.10	μg/l	a
2	Antimony	5.0	μgSb/l	Consumers' taps
3	Arsenic	10	μgAs/l	Consumers' taps
4	Benzene	1.0	μg/l	Consumers' taps
5	Benzo(a)pyrene	0.010	μg/l	Consumers' taps
6	Boron	1.0	mgB/l	Consumers' taps
7	Bromate	10	μBrO3/l	Consumers' taps
8	Cadmium	5.0	μgCd/l	Consumers' taps
9	Chromium	50	μgCr/l	Consumers' taps
10	Copper b	2.0	mgCu/l	Consumers' taps
11	Cyanide	50	μgCN/l	Consumers' taps
12	1, 2 dichloroethane	3.0	μg/l	Consumers' taps
13	Epichlorohydrin	0.10	μg/l	a
14	Fluoride	1.5	mgF/l	Consumers' taps
15	Lead b	(a) 25, from 25th December 2003 until immediately before 25th December 2013	μgPb/l	Consumers' taps
		(b) 10, on and after 25th December 2013	μgPb/l	Consumers' taps
16	Mercury	1.0	μgHg/l	Consumers' taps
17	Nickel b	20	μgNi/l	Consumers' taps
18	Nitrate c	50	mgNO3/l	Consumers' taps
19	Nitrite c	0.50	mgNO2/l	Consumers' taps
		0.10		Treatment Works
20	Pesticides de
	Aldrin)	0.030	μg/l	Consumer’s taps
	Dieldrin)
	Heptachlor)
	Heptachlor
	epoxide)
	other pesticides	0.10	μg/l	Consumers' taps
21	Pesticides: Total f	0.50	μg/l	Consumers' taps
22	Polycyclic aromatic hydrocarbons g	0.10	μg/l	Consumers' taps
23	Selenium	10	μgSe/l	Consumers' taps
24	Tetrachloroethene and Trichloroethene h	10	μg/l	Consumers' taps
25	Trihalomethanes: Total i	100	μg/l	Consumers' taps
26	Vinyl chloride	0.50	μg/l	a

Part II: National requirements
Item	Parameters	Concentration or Value (maximum unless otherwise stated)	Units of Measurement	Point of compliance
1	Aluminium	200	μgAl/l	Consumers' taps
2	Colour	20	mg/l Pt/Co	Consumers' taps
3	Iron	200	μgFe/l	Consumers' taps
4	Manganese	50	μgMn/l	Consumers' taps
5	Odour	Acceptable to consumers and no abnormal change	... ... ... ...	Consumers' taps
6	Sodium	200	mgNa/l	Consumers' taps
7	Taste	Acceptable to consumers and no abnormal change	... ... ... ...	Consumers' taps
8	Tetrachlorome-thane	3	μg/l	Consumers' taps
9	Turbidity	4	NTU	Consumers' taps