http://www.legislation.gov.uk/wsi/2010/994/schedule/1/2018-04-11The Water Supply (Water Quality) Regulations 2010 (revoked)texttext/xmlenStatute Law DatabaseWATER, ENGLAND AND WALES2024-05-15Expert Participation2018-04-11These Regulations supplement Chapter III (Water Supply) of the Water Industry Act 1991 (“the 1991 Act”) and revoke and replace the Water Supply (Water Quality) Regulations 2001 and the Water Supply (Water Quality) Regulations 2001 (Amendment) Regulations 2007. They are primarily concerned with the quality of water supplied by water undertakers whose areas are wholly or mainly in Wales for drinking, washing, cooking and food preparation, and for food production, and with arrangements for the publication of information about water quality.SCHEDULE 1

Regulations 2 and 4

PRESCRIBED CONCENTRATIONS AND VALUESTable AMicrobiological Parameters

Part I: Directive requirements

Item

Parameters

Concentration or Value (maximum)

Units of Measurement

Point of compliance

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 reservoirs1 and water treatment works

2

Escherichia coli (E coli)

0

number/100 ml

Service reservoirs and water treatment works

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

Table BChemical Parameters

Part I: National requirements

Item

Parameters

Concentration or Value (maximum)

Units of Measurement

Point of compliance

1

Acrylamide

0.10

μg/l

1

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 2

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

1

14

Fluoride

1.5

mgF/l

Consumers' taps

15

Lead 2

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 2

20

μgNi/l

Consumers' taps

18

Nitrate 3

50

mgNO3/l

Consumers' taps

19

Nitrite 3

0.50

mgNO2/l

Consumers' taps

0.10

Treatment Works

20

Pesticides 45

Aldrin)

0.030

μg/l

Consumer's taps

Dieldrin)

Heptachlor)

Heptachlor

epoxide)

other pesticides

0.10

μg/l

Consumers' taps

21

Pesticides: Total 6

0.50

μg/l

Consumers' taps

22

Polycyclic aromatic hydrocarbons 7

0.10

μg/l

Consumers' taps

23

Selenium

10

μgSe/l

Consumers' taps

24

Tetrachloroethene and Trichloroethene 8

10

μg/l

Consumers' taps

25

Trihalomethanes: Total 9

100

μg/l

Consumers' taps

26

Vinyl chloride

0.50

μg/l

1

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.

2See also regulation 6(6).

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

4See 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 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

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<num>
SCHEDULE 1
<authorialNote class="referenceNote" placement="right">
<p>Regulations 2 and 4</p>
</authorialNote>
</num>
<heading>PRESCRIBED CONCENTRATIONS AND VALUES</heading>
<content>
<tblock class="tabular">
<num>
<strong>Table A</strong>
</num>
<heading>Microbiological Parameters</heading>
<table>
<tr>
<th colspan="5">
<p>
<strong>
<em>Part I: Directive requirements</em>
</strong>
</p>
</th>
</tr>
<tr>
<th>
<p>
<strong>Item</strong>
</p>
</th>
<th>
<p>
<strong>Parameters</strong>
</p>
</th>
<th>
<p>
<strong>Concentration or Value (maximum)</strong>
</p>
</th>
<th>
<p>
<strong>Units of Measurement</strong>
</p>
</th>
<th>
<p>
<strong>Point of compliance</strong>
</p>
</th>
</tr>
<tr>
<td>
<p>1</p>
</td>
<td>
<p>Enterococci</p>
</td>
<td>
<p>0</p>
</td>
<td>
<p>number/100 ml</p>
</td>
<td>
<p>Consumers' taps</p>
</td>
</tr>
<tr>
<td>
<p>2</p>
</td>
<td>
<p>
<em>Escherichia coli (E coli)</em>
</p>
</td>
<td>
<p>0</p>
</td>
<td>
<p>number/100 ml</p>
</td>
<td>
<p>Consumers' taps</p>
</td>
</tr>
<tr>
<th colspan="5">
<p>
<strong>
<em>Part II: National requirements</em>
</strong>
</p>
</th>
</tr>
<tr>
<th>
<p>
<strong>Item</strong>
</p>
</th>
<th>
<p>
<strong>Parameters</strong>
</p>
</th>
<th>
<p>
<strong>Concentration or Value (maximum)</strong>
</p>
</th>
<th>
<p>
<strong>Units of Measurement</strong>
</p>
</th>
<th>
<p>
<strong>Point of compliance</strong>
</p>
</th>
</tr>
<tr>
<td>
<p>1</p>
</td>
<td>
<p>Coliform bacteria</p>
</td>
<td>
<p>0</p>
</td>
<td>
<p>number/100 ml</p>
</td>
<td>
<p>
Service reservoirs
<sup>1</sup>
and water treatment works
</p>
</td>
</tr>
<tr>
<td>
<p>2</p>
</td>
<td>
<p>
<em>Escherichia coli (E coli)</em>
</p>
</td>
<td>
<p>0</p>
</td>
<td>
<p>number/100 ml</p>
</td>
<td>
<p>Service reservoirs and water treatment works</p>
</td>
</tr>
<tr class="tfoot">
<td colspan="5">
<p>
<sup>1</sup>
Note: Compliance required as to 95% of samples from each service reservoir (regulation 4(6)).
</p>
</td>
</tr>
</table>
</tblock>
<tblock class="tabular">
<num>
<strong>Table B</strong>
</num>
<heading>Chemical Parameters</heading>
<table>
<tr>
<th colspan="5">
<p>
<strong>
<em>Part I: National requirements</em>
</strong>
</p>
</th>
</tr>
<tr>
<th>
<p>
<strong>Item</strong>
</p>
</th>
<th>
<p>
<strong>Parameters</strong>
</p>
</th>
<th>
<p>
<strong>Concentration or Value (maximum)</strong>
</p>
</th>
<th>
<p>
<strong>Units of Measurement</strong>
</p>
</th>
<th>
<p>
<strong>Point of compliance</strong>
</p>
</th>
</tr>
<tr>
<td>
<p>1</p>
</td>
<td>
<p>Acrylamide</p>
</td>
<td>
<p>0.10</p>
</td>
<td>
<p>μg/l</p>
</td>
<td>
<p>
<sup>1</sup>
</p>
</td>
</tr>
<tr>
<td>
<p>2</p>
</td>
<td>
<p>Antimony</p>
</td>
<td>
<p>5.0</p>
</td>
<td>
<p>μgSb/l</p>
</td>
<td>
<p>Consumers' taps</p>
</td>
</tr>
<tr>
<td>
<p>3</p>
</td>
<td>
<p>Arsenic</p>
</td>
<td>
<p>10</p>
</td>
<td>
<p>μgAs/l</p>
</td>
<td>
<p>Consumers' taps</p>
</td>
</tr>
<tr>
<td>
<p>4</p>
</td>
<td>
<p>Benzene</p>
</td>
<td>
<p>1.0</p>
</td>
<td>
<p>μg/l</p>
</td>
<td>
<p>Consumers' taps</p>
</td>
</tr>
<tr>
<td>
<p>5</p>
</td>
<td>
<p>Benzo(a)pyrene</p>
</td>
<td>
<p>0.010</p>
</td>
<td>
<p>μg/l</p>
</td>
<td>
<p>Consumers' taps</p>
</td>
</tr>
<tr>
<td>
<p>6</p>
</td>
<td>
<p>Boron</p>
</td>
<td>
<p>1.0</p>
</td>
<td>
<p>mgB/l</p>
</td>
<td>
<p>Consumers' taps</p>
</td>
</tr>
<tr>
<td>
<p>7</p>
</td>
<td>
<p>Bromate</p>
</td>
<td>
<p>10</p>
</td>
<td>
<p>
μBrO
<sub>3</sub>
/l
</p>
</td>
<td>
<p>Consumers' taps</p>
</td>
</tr>
<tr>
<td>
<p>8</p>
</td>
<td>
<p>Cadmium</p>
</td>
<td>
<p>5.0</p>
</td>
<td>
<p>μgCd/l</p>
</td>
<td>
<p>Consumers' taps</p>
</td>
</tr>
<tr>
<td>
<p>9</p>
</td>
<td>
<p>Chromium</p>
</td>
<td>
<p>50</p>
</td>
<td>
<p>μgCr/l</p>
</td>
<td>
<p>Consumers' taps</p>
</td>
</tr>
<tr>
<td>
<p>10</p>
</td>
<td>
<p>
Copper
<sup>2</sup>
</p>
</td>
<td>
<p>2.0</p>
</td>
<td>
<p>mgCu/l</p>
</td>
<td>
<p>Consumers' taps</p>
</td>
</tr>
<tr>
<td>
<p>11</p>
</td>
<td>
<p>Cyanide</p>
</td>
<td>
<p>50</p>
</td>
<td>
<p>μgCN/l</p>
</td>
<td>
<p>Consumers' taps</p>
</td>
</tr>
<tr>
<td>
<p>12</p>
</td>
<td>
<p>1, 2 dichloroethane</p>
</td>
<td>
<p>3.0</p>
</td>
<td>
<p>μg/l</p>
</td>
<td>
<p>Consumers' taps</p>
</td>
</tr>
<tr>
<td>
<p>13</p>
</td>
<td>
<p>Epichlorohydrin</p>
</td>
<td>
<p>0.10</p>
</td>
<td>
<p>μg/l</p>
</td>
<td>
<p>
<sup>1</sup>
</p>
</td>
</tr>
<tr>
<td>
<p>14</p>
</td>
<td>
<p>Fluoride</p>
</td>
<td>
<p>1.5</p>
</td>
<td>
<p>mgF/l</p>
</td>
<td>
<p>Consumers' taps</p>
</td>
</tr>
<tr>
<td rowspan="2">
<p>15</p>
</td>
<td rowspan="2">
<p>
Lead
<sup>2</sup>
</p>
</td>
<td>
<p>
<embeddedStructure>
<paragraph eId="schedule-1-paragraph-a">
<num>a</num>
<content>
<p>25, from 25th December 2003 until immediately before 25th December 2013</p>
</content>
</paragraph>
<p/>
</embeddedStructure>
</p>
</td>
<td>
<p>μgPb/l</p>
</td>
<td>
<p>Consumers' taps</p>
</td>
</tr>
<tr>
<td>
<p>
<embeddedStructure>
<paragraph eId="schedule-1-paragraph-b">
<num>b</num>
<content>
<p>10, on and after 25th December 2013</p>
</content>
</paragraph>
<p/>
</embeddedStructure>
</p>
</td>
<td>
<p>μgPb/l</p>
</td>
<td>
<p>Consumers' taps</p>
</td>
</tr>
<tr>
<td>
<p>16</p>
</td>
<td>
<p>Mercury</p>
</td>
<td>
<p>1.0</p>
</td>
<td>
<p>μgHg/l</p>
</td>
<td>
<p>Consumers' taps</p>
</td>
</tr>
<tr>
<td>
<p>17</p>
</td>
<td>
<p>
Nickel
<sup>2</sup>
</p>
</td>
<td>
<p>20</p>
</td>
<td>
<p>μgNi/l</p>
</td>
<td>
<p>Consumers' taps</p>
</td>
</tr>
<tr>
<td>
<p>18</p>
</td>
<td>
<p>
Nitrate
<sup>3</sup>
</p>
</td>
<td>
<p>50</p>
</td>
<td>
<p>
mgNO
<sub>3</sub>
/l
</p>
</td>
<td>
<p>Consumers' taps</p>
</td>
</tr>
<tr>
<td rowspan="2">
<p>19</p>
</td>
<td rowspan="2">
<p>
Nitrite
<sup>3</sup>
</p>
</td>
<td>
<p>0.50</p>
</td>
<td>
<p>
mgNO
<sub>2</sub>
/l
</p>
</td>
<td>
<p>Consumers' taps</p>
</td>
</tr>
<tr>
<td>
<p>0.10</p>
</td>
<td>
<p/>
</td>
<td>
<p>Treatment Works</p>
</td>
</tr>
<tr>
<td rowspan="7">
<p>20</p>
</td>
<td>
<p>
Pesticides
<sup>45</sup>
</p>
</td>
<td>
<p/>
</td>
<td>
<p/>
</td>
<td>
<p/>
</td>
</tr>
<tr>
<td>
<p>Aldrin)</p>
</td>
<td rowspan="5">
<p>0.030</p>
</td>
<td rowspan="5">
<p>μg/l</p>
</td>
<td rowspan="5">
<p>Consumer's taps</p>
</td>
</tr>
<tr>
<td>
<p>Dieldrin)</p>
</td>
</tr>
<tr>
<td>
<p>Heptachlor)</p>
</td>
</tr>
<tr>
<td>
<p>Heptachlor</p>
</td>
</tr>
<tr>
<td>
<p>epoxide)</p>
</td>
</tr>
<tr>
<td>
<p>other pesticides</p>
</td>
<td>
<p>0.10</p>
</td>
<td>
<p>μg/l</p>
</td>
<td>
<p>Consumers' taps</p>
</td>
</tr>
<tr>
<td>
<p>21</p>
</td>
<td>
<p>
Pesticides: Total
<sup>6</sup>
</p>
</td>
<td>
<p>0.50</p>
</td>
<td>
<p>μg/l</p>
</td>
<td>
<p>Consumers' taps</p>
</td>
</tr>
<tr>
<td>
<p>22</p>
</td>
<td>
<p>
Polycyclic aromatic hydrocarbons
<sup>7</sup>
</p>
</td>
<td>
<p>0.10</p>
</td>
<td>
<p>μg/l</p>
</td>
<td>
<p>Consumers' taps</p>
</td>
</tr>
<tr>
<td>
<p>23</p>
</td>
<td>
<p>Selenium</p>
</td>
<td>
<p>10</p>
</td>
<td>
<p>μgSe/l</p>
</td>
<td>
<p>Consumers' taps</p>
</td>
</tr>
<tr>
<td>
<p>24</p>
</td>
<td>
<p>
Tetrachloroethene and Trichloroethene
<sup>8</sup>
</p>
</td>
<td>
<p>10</p>
</td>
<td>
<p>μg/l</p>
</td>
<td>
<p>Consumers' taps</p>
</td>
</tr>
<tr>
<td>
<p>25</p>
</td>
<td>
<p>
Trihalomethanes: Total
<sup>9</sup>
</p>
</td>
<td>
<p>100</p>
</td>
<td>
<p>μg/l</p>
</td>
<td>
<p>Consumers' taps</p>
</td>
</tr>
<tr>
<td>
<p>26</p>
</td>
<td>
<p>Vinyl chloride</p>
</td>
<td>
<p>0.50</p>
</td>
<td>
<p>μg/l</p>
</td>
<td>
<p>
<sup>1</sup>
</p>
</td>
</tr>
<tr class="tfoot">
<td colspan="5">
<p>
<em>Notes:</em>
</p>
</td>
</tr>
<tr class="tfoot">
<td colspan="5">
<p>
<sup>1</sup>
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.
</p>
</td>
</tr>
<tr class="tfoot">
<td colspan="5">
<p>
<sup>2</sup>
<em>See</em>
also regulation 6(6).
</p>
</td>
</tr>
<tr class="tfoot">
<td colspan="5">
<p>
<sup>3</sup>
<em>See</em>
also regulation 4(2)(d).
</p>
</td>
</tr>
<tr class="tfoot">
<td colspan="5">
<p>
<sup>4</sup>
<em>See</em>
the definition of “pesticides and related products” in regulation 2.
</p>
</td>
</tr>
<tr class="tfoot">
<td colspan="5">
<p>
<sup>5</sup>
The parametric value applies to each individual pesticide.
</p>
</td>
</tr>
<tr class="tfoot">
<td colspan="5">
<p>
<sup>6</sup>
<term refersTo="#term-pesticides:-total">Pesticides: Total</term>
” means the sum of the concentrations of the individual pesticides detected and quantified in the monitoring procedure.
</p>
</td>
</tr>
<tr class="tfoot">
<td colspan="5">
<p>
<sup>7</sup>
The specified compounds are:
</p>
<blockList class="unordered">
<item>
<p>— benzo(b)fluoranthene</p>
</item>
<item>
<p>— benzo(k)fluoranthene</p>
</item>
<item>
<p>— benzo(ghi)perylene</p>
</item>
<item>
<p>— indeno(1,2,3-cd)pyrene.</p>
</item>
</blockList>
<p>The parametric value applies to the sum of the concentrations of the individual compounds detected and quantified in the monitoring process.</p>
</td>
</tr>
<tr class="tfoot">
<td colspan="5">
<p>
<sup>8</sup>
The parametric value applies to the sum of the concentrations of the individual compounds detected and quantified in the monitoring process.
</p>
</td>
</tr>
<tr class="tfoot">
<td colspan="5">
<p>
<sup>9</sup>
The specified compounds are:
</p>
<blockList class="unordered">
<item>
<p>— chloroform</p>
</item>
<item>
<p>— bromoform</p>
</item>
<item>
<p>— dibromochloromethane</p>
</item>
<item>
<p>— bromodichloromethane.</p>
</item>
</blockList>
<p>The parametric value applies to the sum of the concentrations of the individual compounds detected and quantified in the monitoring process.</p>
</td>
</tr>
</table>
</tblock>
<tblock class="tabular">
<table>
<tr>
<th colspan="5">
<p>
<strong>
<em>Part II: National requirements</em>
</strong>
</p>
</th>
</tr>
<tr>
<th>
<p>
<strong>Item</strong>
</p>
</th>
<th>
<p>
<strong>Parameters</strong>
</p>
</th>
<th>
<p>
<strong>Concentration or Value (maximum unless otherwise stated)</strong>
</p>
</th>
<th>
<p>
<strong>Units of Measurement</strong>
</p>
</th>
<th>
<p>
<strong>Point of compliance</strong>
</p>
</th>
</tr>
<tr>
<td>
<p>1</p>
</td>
<td>
<p>Aluminium</p>
</td>
<td>
<p>200</p>
</td>
<td>
<p>μgAl/l</p>
</td>
<td>
<p>Consumers' taps</p>
</td>
</tr>
<tr>
<td>
<p>2</p>
</td>
<td>
<p>Colour</p>
</td>
<td>
<p>20</p>
</td>
<td>
<p>mg/l Pt/Co</p>
</td>
<td>
<p>Consumers' taps</p>
</td>
</tr>
<tr>
<td>
<p>3</p>
</td>
<td>
<p>Iron</p>
</td>
<td>
<p>200</p>
</td>
<td>
<p>μgFe/l</p>
</td>
<td>
<p>Consumers' taps</p>
</td>
</tr>
<tr>
<td>
<p>4</p>
</td>
<td>
<p>Manganese</p>
</td>
<td>
<p>50</p>
</td>
<td>
<p>μgMn/l</p>
</td>
<td>
<p>Consumers' taps</p>
</td>
</tr>
<tr>
<td>
<p>5</p>
</td>
<td>
<p>Odour</p>
</td>
<td>
<p>Acceptable to consumers and no abnormal change</p>
</td>
<td>
<p>....................</p>
</td>
<td>
<p>Consumers' taps</p>
</td>
</tr>
<tr>
<td>
<p>6</p>
</td>
<td>
<p>Sodium</p>
</td>
<td>
<p>200</p>
</td>
<td>
<p>mgNa/l</p>
</td>
<td>
<p>Consumers' taps</p>
</td>
</tr>
<tr>
<td>
<p>7</p>
</td>
<td>
<p>Taste</p>
</td>
<td>
<p>Acceptable to consumers and no abnormal change</p>
</td>
<td>
<p>....................</p>
</td>
<td>
<p>Consumers' taps</p>
</td>
</tr>
<tr>
<td>
<p>8</p>
</td>
<td>
<p>Tetrachlorome-thane</p>
</td>
<td>
<p>3</p>
</td>
<td>
<p>μg/l</p>
</td>
<td>
<p>Consumers' taps</p>
</td>
</tr>
<tr>
<td>
<p>9</p>
</td>
<td>
<p>Turbidity</p>
</td>
<td>
<p>4</p>
</td>
<td>
<p>NTU</p>
</td>
<td>
<p>Consumers' taps</p>
</td>
</tr>
</table>
</tblock>
</content>
</hcontainer>
</hcontainer>
</portionBody>
</portion>
</akomaNtoso>