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The Water Supply (Water Quality) Regulations 2001

Type Welsh-Statutory-Instrument

Publication 2001-12-07

Last updated 2010-04-20

State In force

Jurisdiction Wales

Department King's Printer of Acts of Parliament

Source legislation.gov.uk

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Reform history JSON API

(1)	(2)	(3)	(4)	(5)	(6)
Organism or substance	Concentration or value and unit of measurement	Volume of water supplied m³/d	Annual sampling frequency	Estimated population of water supply zone	Annual sampling frequency
Benzene	1.0℞g/l
Bromate	1.0℞gBrO₃/l
		3999	S2 or R1	34,999	S2 or R1
Clostridium perfringens* (Including spores)	0	1,000—49,999	S4 or R1	5,000—50,000	S4 or R1
		350,000
	Number/ 100ml		S8 or R2
1,2 dichloroethane	3.0℞g/l
Enterococci	0 Number/100ml
Nitrite	0.10 mgNO₂/l

*where the water originates from, or is influenced by, surface waters

(1)	(2)	(3)	(4)	(5)
Parameter or other substance	Concentration and unit of measurement	Trueness % of concentration	Precision % of concentration	Limit of detection % of concentration
Antimony	5.0℞gSb/l	25	25	25
Arsenic	10℞gAs/l	10	10	10
Benzene	1.0℞g/l	25	25	25
Boron	1.0 mgB/l	10	10	10
Bromate	10℞BrO₃/l	25	25	25
Copper	2.0 mgCu/l	10	10	10
1,2 dichloroethane	3.0℞g/l	25	25	10
Lead	25℞gPb/l	10	10	10
Nickel	20℞gNi/l	10	10	10
Nitrite (ex works)	0.1 gNO₂/l	10	10	10
Tetrachloroethene)Trichloroethene )	10℞g/l	25	25	10

*Trueness, precision and limit of detection apply to the individual substances specified at 50% of the concentration in column (2).

A water undertaker’s programme of work shall—

(a) identify, by reference to the parameters set out in the Table below, those parameters in respect of which the requirements of regulation 41(1)(a) and (b) are unlikely to be satisfied unless steps are taken to secure that those requirements will be met;

(b) identify whether the requirement that the formula [nitrate]/50 + [nitrite]/331, where the square brackets signify the concentrations in mg/1 for nitrate (NO₃) and nitrite (NO₂), is unlikely to be satisfied;

(c) specify the steps that the water undertaker intends to take for the purpose of securing that the requirements of regulation 41(1)(a) and (b) are met;

(d) specify the date by which each of the steps specified in accordance with paragraph (c) is proposed to be completed; and

(e) specify the times at which, or the periods within which, reports will be made to the National Assembly for Wales in relation to the taking and completion of the steps specified in accordance with paragraph (c).

Enterococci

Acrylamide

Antimony

Arsenic

Benzene

Benzo(a)pyrene

Boron

Bromate

Copper

1,2-dichloroethane

Epichlorohydrin

Lead

Nickel

Nitrite

Polycyclic aromatic hydrocarbons

Tetrachloroethene ) sum of concentrations

Trichloroethene )

Trihalomethanes — Total (sum of concentrations of chloroform, bromoform, dibromochloromethane and bromodichloromethane)

Vinyl chloride

Editorial notes

[^key-c1d8fc76ef9bad68d81db098d157e92e]: Regulations revoked (20.4.2010) by The Water Supply (Water Quality) Regulations 2010 (S.I. 2010/994), regs. 1(1), 39 (with reg. 1(2)(3))

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PART VA — DRINKING WATER PROTECTED AREAS

Drinking water abstraction points: monitoring sites

16A

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Disinfection and other treatment arrangements

Risk assessment

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