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The Water Supply (Water Quality) Regulations 2010 (revoked)

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Changes over time for: SCHEDULE 1

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Version Superseded: 15/06/2018

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Point in time view as at 11/04/2018.

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Regulations 2 and 4

SCHEDULE 1E+WPRESCRIBED CONCENTRATIONS AND VALUES

Table A

Microbiological Parameters

1 Note: Compliance required as to 95% of samples from each service reservoir (regulation 4(6)).

Part I: Directive requirements
ItemParametersConcentration or Value (maximum)Units of MeasurementPoint of compliance
1Enterococci0number/100 mlConsumers' taps
2Escherichia coli (E coli)0number/100 mlConsumers' taps
Part II: National requirements
ItemParametersConcentration or Value (maximum)Units of MeasurementPoint of compliance
1Coliform bacteria0number/100 mlService reservoirs1 and water treatment works
2Escherichia coli (E coli)0number/100 mlService reservoirs and water treatment works

Table B

Chemical Parameters

Notes:

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. This is controlled by product specification.

2 See also regulation 6(6).

3 See also regulation 4(2)(d).

4 See the definition of “pesticides and related products” in regulation 2.

5 The parametric value applies to each individual pesticide.

6Pesticides: Total” means the sum of the concentrations of the individual pesticides detected and quantified in the monitoring procedure.

7 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.

8 The parametric value applies to the sum of the concentrations of the individual compounds detected and quantified in the monitoring process.

9 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.

Part I: National requirements
ItemParametersConcentration or Value (maximum)Units of MeasurementPoint of compliance
1Acrylamide0.10μg/l1
2Antimony5.0μgSb/lConsumers' taps
3Arsenic10μgAs/lConsumers' taps
4Benzene1.0μg/lConsumers' taps
5Benzo(a)pyrene0.010μg/lConsumers' taps
6Boron1.0mgB/lConsumers' taps
7Bromate10μBrO3/lConsumers' taps
8Cadmium5.0μgCd/lConsumers' taps
9Chromium50μgCr/lConsumers' taps
10Copper 22.0mgCu/lConsumers' taps
11Cyanide50μgCN/lConsumers' taps
121, 2 dichloroethane3.0μg/lConsumers' taps
13Epichlorohydrin0.10μg/l1
14Fluoride1.5mgF/lConsumers' taps
15Lead 2

(a)25, from 25th December 2003 until immediately before 25th December 2013

μgPb/lConsumers' taps

(b)10, on and after 25th December 2013

μgPb/lConsumers' taps
16Mercury1.0μgHg/lConsumers' taps
17Nickel 220μgNi/lConsumers' taps
18Nitrate 350mgNO3/lConsumers' taps
19Nitrite 30.50mgNO2/lConsumers' taps
0.10Treatment Works
20Pesticides 45
Aldrin)0.030μg/lConsumer's taps
Dieldrin)
Heptachlor)
Heptachlor
epoxide)
other pesticides0.10μg/lConsumers' taps
21Pesticides: Total 60.50μg/lConsumers' taps
22Polycyclic aromatic hydrocarbons 70.10μg/lConsumers' taps
23Selenium10μgSe/lConsumers' taps
24Tetrachloroethene and Trichloroethene 810μg/lConsumers' taps
25Trihalomethanes: Total 9100μg/lConsumers' taps
26Vinyl chloride0.50μg/l1
Part II: National requirements
ItemParametersConcentration or Value (maximum unless otherwise stated)Units of MeasurementPoint of compliance
1Aluminium200μgAl/lConsumers' taps
2Colour20mg/l Pt/CoConsumers' taps
3Iron200μgFe/lConsumers' taps
4Manganese50μgMn/lConsumers' taps
5OdourAcceptable to consumers and no abnormal change....................Consumers' taps
6Sodium200mgNa/lConsumers' taps
7TasteAcceptable to consumers and no abnormal change....................Consumers' taps
8Tetrachlorome-thane3μg/lConsumers' taps
9Turbidity4NTUConsumers' taps

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