The Private Water Supplies (Wales) Regulations 2010

Made: 13 January 2010

Laid before the National Assembly for Wales: 14 January 2010

Coming into force: 4 February 2010

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PART 1 — Water standards

Title, application and commencement

1

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Scope

2

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Exemptions

3

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Wholesomeness

4

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Disinfection

5

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Requirement to carry out a risk assessment

6

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PART 2 — Monitoring

Monitoring

7

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Further distribution of supplies from water undertakers or water supply licensees

8

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Large supplies and supplies to commercial or public premises

9

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Other private supplies

10

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Sampling and analysis

11

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Maintenance of records

12

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Notification of information

13

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PART 3 — Action in the event of failure

Provision of information

14

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Investigation

15

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Procedure following investigation

16

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Authorisations of different standards

17

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PART 4 — Notice procedure

Notices

18

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Appeals

19

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Penalties

20

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PART 5 — Miscellaneous

Fees

21

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Revocation

22

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SCHEDULE 1 — Concentrations or Values

PART 1 — Wholesomeness

Parameters	Maximum concentration or value	Units of Measurement
Escherichia coli (E. coli)	0	Number/100ml
Enterococci	0	Number/100ml
In the case of water in bottles or containers:
Escherichia coli (E.coli)	0	Number/250ml
Enterococci	0	Number/250ml
Pseudomonas aeruginosa	0	Number/250ml
Colony count 22°C	100	Number/ml
Colony count 37°C	20	Number/ml
Parameters	Maximum concentration or value	Units of Measurement
---	---	---
(i) 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.	(i) 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.	(i) 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.
(ii) See also the nitrate-nitrite formula in regulation 4(c).	(ii) See also the nitrate-nitrite formula in regulation 4(c).	(ii) See also the nitrate-nitrite formula in regulation 4(c).
(iii) For these purposes “Pesticides” means: organic insecticides organic herbicides organic fungicides organic nematocides organic acaricides organic algicides organic rodenticides organic slimicides related products (inter alia, growth regulators) and their relevant metabolites, degradation and reaction products. Only those pesticides likely to be present in a given supply need be monitored.	(iii) For these purposes “Pesticides” means: organic insecticides organic herbicides organic fungicides organic nematocides organic acaricides organic algicides organic rodenticides organic slimicides related products (inter alia, growth regulators) and their relevant metabolites, degradation and reaction products. Only those pesticides likely to be present in a given supply need be monitored.	(iii) For these purposes “Pesticides” means: organic insecticides organic herbicides organic fungicides organic nematocides organic acaricides organic algicides organic rodenticides organic slimicides related products (inter alia, growth regulators) and their relevant metabolites, degradation and reaction products. Only those pesticides likely to be present in a given supply need be monitored.
(iv) “Pesticides total” means the sum of the concentrations of the individual pesticides detected and quantified in the monitoring process.	(iv) “Pesticides total” means the sum of the concentrations of the individual pesticides detected and quantified in the monitoring process.	(iv) “Pesticides total” means the sum of the concentrations of the individual pesticides detected and quantified in the monitoring process.
(v) 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.	(v) 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.	(v) 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.
(vi) The parametric value applies to the sum of the concentrations of the individual compounds detected and quantified in the monitoring process.	(vi) The parametric value applies to the sum of the concentrations of the individual compounds detected and quantified in the monitoring process.	(vi) The parametric value applies to the sum of the concentrations of the individual compounds detected and quantified in the monitoring process.
(vii) 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.	(vii) 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.	(vii) 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.
Acrylamide [^f01000]	0.10	μg/l
Antimony	5.0	μg/l
Arsenic	10	μg/l
Benzene	1.0	μg/l
Benzo(a)pyrene	0.010	μg/l
Boron	1.0	mg/l
Bromate	10	μg/l
Cadmium	5.0	μg/l
Chromium	50	μg/l
Copper	2.0	mg/l
Cyanide	50	μg/l
1, 2 dichloroethane	3.0	μg/l
Epichlorohydrin [^f01000]	0.10	μg/l
Fluoride	1.5	mg/l
Lead	25 (until 25th December 2013)	μg/l
	10 (from 25th December 2013)	μg/l
Mercury	1.0	μg/l
Nickel	20	μg/l
Nitrate [^f01001]	50	mg/l
Nitrite[^f01001]	0.5 (or 0.1 in the case of treatment works)	mg/l
Pesticides [^f01002]—
Aldrin	0.030	μg/l
Dieldrin	0.030	μg/l
Heptachlor	0.030	μg/l
Heptachlor epoxide	0.030	μg/l
Other pesticides	0.10	μg/l
Pesticides total [^f01003]	0.50	μg/l
Polycyclic aromatic hydrocarbons [^f01004]	0.10	μg/l
Selenium	10	μg/l
Tetrachloroethene and Trichloroethene [^f01005]	10	μg/l
Trihalomethanes: Total [^f01006]	100	μg/l
Vinyl chloride [^f01000]	0.50	μg/l
Parameters	Maximum concentration or value	Units of Measurement
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Aluminium	200	μg/l
Colour	20	mg/l Pt/Co
Iron	200	μg/l
Manganese	50	μg/l
Odour	Acceptable to consumers and no abnormal change
Sodium	200	mg/l
Taste	Acceptable to consumers and no abnormal change
Tetrachloromethane	3	μg/l
Turbidity	4	NTU

PART 2 — Indicator Parameters

¹ The water should not be aggressive.	¹ The water should not be aggressive.	¹ The water should not be aggressive.
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³ Only in the case of surface water or groundwater that has been influenced by surface water.	³ Only in the case of surface water or groundwater that has been influenced by surface water.	³ Only in the case of surface water or groundwater that has been influenced by surface water.
Parameters	Maximum concentration or value or state (unless otherwise stated)	Units of measurement
Ammonium	0.50	mg/l
Chloride ¹	250	mg/l
Clostridium perfringens	0	Number/100ml
(including spores)
Coliform bacteria	0	Number/100ml (Number/250ml in the case of water put into bottles or containers)
Colony counts	No abnormal change	Number/ml at 22°C
	No abnormal change	Number/ml at 37°C
Conductivity ¹	2500	μS/cm at 20°C
Hydrogen ion	9.5 (maximum)	pH value
	6.5 (minimum) (in the case of still water put into bottles or containers the minimum is 4.5)	pH value
Sulphate ¹	250	mg/l
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Total organic carbon (TOC)	No abnormal change	mgC/l
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Turbidity³	1	NTU

SCHEDULE 2 — Monitoring

PART 1 — Check monitoring

Sampling

1

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Frequency of sampling

2

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PART 2 — Audit monitoring

Sampling

3

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Frequency of sampling

4

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PART 3 — Minimum frequency for both check monitoring and audit monitoring for water put into bottles or containers

¹ The volumes are calculated as averages taken over a calendar year.	¹ The volumes are calculated as averages taken over a calendar year.	¹ The volumes are calculated as averages taken over a calendar year.
Volume¹ of water produced in bottles or containers each day (m³)	Check monitoring number of samples per year	Audit monitoring number of samples per year
≤ 10	1	1
>10≤60	12	1
> 60	1 for each 5 m³/day of the total volume (rounding up to the nearest multiple of 5 m³/day)	1 for each 100 m³/day of the total volume (rounding up to the nearest multiple of 100 m³/day)

SCHEDULE 3 — Sampling and analysis

PART 1 — General

Samples: general

1

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Analysing samples

2

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Authorisation of alternative methods of analysis

3

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Sampling and analysis by persons other than local authorities

4

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PART 2 — Analytical methods