The Private Water Supplies (Wales) Regulations 2017

Made: 25 October 2017

Laid before the National Assembly for Wales: 30 October 2017

Coming into force: 20 November 2017

The Welsh Ministers make these Regulations in exercise of the powers conferred by section 2(2) of the European Communities Act 1972 and sections 67, 77(3) and (4) and 213(2) of the Water Industry Act 1991[^f00004].

PART 1 — Water standards

Title, application and commencement

1

The title of these Regulations is the Private Water Supplies (Wales) Regulations 2017; they apply in relation to Wales and come into force on 20 November 2017.

Interpretation

2

• (1) In these Regulations—

• “the Act” (“y Ddeddf”) means the Water Industry Act 1991;

• “the 2010 Regulations” (“Rheoliadau 2010”) means the Private Water Supplies (Wales) Regulations 2010[^f00005];

• “the Chief Inspector of Drinking Water” (“y Prif Arolygydd Dŵr Yfed”) means the person designated by the Welsh Ministers under section 86(1B) of the Act (assessors for the enforcement of water quality)[^f00006];

• “consumer” (“defnyddiwr”) mean a person to whom a private water supply is provided for human consumption purposes;

• “disinfection” (“diheintio”) means a process of water treatment to remove, or render harmless to human health, every pathogenic micro-organism and pathogenic parasite that would otherwise be present in the water;

• “domestic tenancy” (“tenantiaeth ddomestig”) has the same meaning as in section 2 of the Housing (Wales) Act 2014 (meaning of key terms)[^f00007];

• “indicative dose” (“dos dangosol”) means the committed effective dose for 1 year of ingestion resulting from all the radionuclides whose presence has been detected in a supply of water intended for human consumption, of natural and artificial origin, excluding tritium, potassium−40, radon and short-lived radon decay products;

• “monitoring for Group A parameters” (“monitro ar gyfer paramedrau Grŵp A”) has the meaning given in paragraph 1 of Schedule 2;

• “monitoring for Group B parameters” (“monitro ar gyfer paramedrau Grŵp B”) has the meaning given in paragraph 3 of Schedule 2;

• “NTU” (“NTU”) means Nephelometric Turbidity Unit;

• “parameter” (“paramedr”) means a property, element, organism or substance listed in the first column of the Tables in the Schedule 1 as read, where appropriate, with the notes to that Schedule and those Tables;

• “prescribed concentration or value” (“crynodiad neu werth rhagnodedig”) in relation to any parameter, means the maximum or minimum concentration or value specified in relation to that parameter in the Tables in Schedule 1 as measured by reference to the unit of measurement so specified, and as read, where appropriate, with the notes to that Schedule and those Tables;

• “private water supply” (“cyflenwad dŵr preifat”) means a supply of water other than a supply provided directly by a water undertaker[^f00008] or water supply licensee[^f00009], and which is comprised of all physical assets from the point of abstraction to the point of use, including associated pipes, fittings and tanks;

• “relevant person” (“person perthnasol”) means—the owner and occupier (who may be the same or different persons) of premises which are supplied with water for domestic or food production purposes by means of a private water supply;the owner and occupier (who may be the same or different persons) of land on which any part of the supply is situated;any other person who exercises powers of management or control in relation to that supply;

• “risk assessment” (“asesiad risg”) means a risk assessment carried out under regulation 6.

• (2) In these Regulations, a reference to an EU or Euratom Directive is to be read as if any reference in that Directive to a member State in a provision imposing an obligation on, or providing a discretion to, a member State were to either the Welsh Ministers or local authority depending on which, immediately before exit day, was responsible for compliance with that obligation, or exercise of that discretion, in respect of Wales.

Scope

3

• (1) These Regulations apply in relation to private water supplies intended for human consumption; and for these purposes “water intended for human consumption” means—

• (a) all water either in its original state or after treatment, intended for drinking, cooking, food preparation or other domestic purposes, regardless of its origin and whether it is supplied from a distribution network, from a tanker, or in bottles or containers;

• (b) all water used in any food production undertaking for the manufacture, processing, preservation or marketing of products or substances intended for human consumption unless, in accordance with Regulation (EC) No. 852/2004 of the European Parliament and of the Council on the hygiene of foodstuffs[^f00010], the competent authority[^f00011] is satisfied that the quality of the water cannot affect the wholesomeness of the foodstuff in its finished form.

• (2) These Regulations do not apply in relation to—

• (a) water to which the Natural Mineral Water, Spring Water and Bottled Drinking Water (Wales) Regulations 2015[^f00012] apply;

• (b) water that is a medicinal product within the meaning of the Medicines Act 1968[^f00013];

• (c) water used solely for washing a crop after it has been harvested and that does not affect the fitness for human consumption of the crop or of any food or drink derived from the crop.

Wholesomeness

4

• (1) A private water supply is to be regarded as wholesome if all the following conditions are met—

• (a) it does not contain any micro-organism, parasite or substance, alone or in conjunction with any other substance, at a concentration or value that would constitute a potential danger to human health;

• (b) it complies with the prescribed concentration or value for each parameter; and

• (c) the water satisfies the formula “[nitrate]/50 + [nitrite]/3 ≤ 1”, where the square brackets signify the concentrations in mg/1 for nitrate (NO3) and nitrite (NO2).

• (2) A reference in these Regulations to water being unwholesome means the requirements in paragraph (1) not being met.

Use of products or substances in private water supplies and disinfection arrangements

5

• (1) Any product or substance used in the preparation or distribution of a private water supply, or impurities associated with such products or substances, must not be present in water at the point of use at levels that would make it unwholesome or constitute a potential danger to human health.

• (2) Where disinfection forms part of the preparation or distribution of water, the relevant person must—

• (a) design, operate and maintain the disinfection process so as to keep the presence of disinfection by-products as low as possible without compromising the effectiveness of the disinfection process;

• (b) ensure that the effectiveness of the disinfection process is maintained;

• (c) keep records of the maintenance and monitoring which have been undertaken in order to verify the effectiveness of the disinfection process; and

• (d) keep copies of those records available for inspection by the local authority, for a period of 5 years.

Requirement to carry out a risk assessment

6

• (1) A local authority[^f00014] must carry out a risk assessment for every private water supply in its area and review and update that risk assessment every 5 years (or earlier if it considers that the existing risk assessment is inadequate).

• (2) In the case of a supply provided to a single dwelling, the duty in paragraph (1) applies only where that supply is provided as part of a commercial or public activity or as part of a domestic tenancy.

• (3) In the case of a supply provided to a single dwelling not falling within paragraph (2), a local authority must carry out a risk assessment if requested to do so by the owner or occupier of that dwelling.

• (4) A risk assessment must—

• (a) establish whether there is a significant risk of supplying water that would constitute a potential danger to human health;

• (b) satisfy the requirements of the Security of Drinking Water Supply Guidelines for Risk and Crisis Management[^f00015]; and

• (c) take into account the results from the monitoring programmes established by the second paragraph of Article 7(1) and Article 8 of Directive 2000/60/EC of the European Parliament and of the Council[^f00016].

• (5) A local authority must within 12 months of having carried out a risk assessment provide the Welsh Ministers with a summary of the results of that assessment.

• (6) For the purposes of paragraph (4)(c), a reference to Articles 7(1) and 8 of Directive 2000/60/EC is to be read with the following modifications—

• (a) as if any reference to Annex 5 of that Directive were a reference to that Annex as modified by Part 1 of Schedule 5 to the Water Environment (Water Framework Directive) (England and Wales) Regulations 2017;

• (b) in Article 8, as if—

• (i) in paragraph 1, the final indent were omitted;

• (ii) in paragraph 2, the first sentence were omitted;

• (iii) paragraph 3 were omitted.

PART 2 — Monitoring

Monitoring

7

• (1) A local authority must monitor all private water supplies in its area in accordance with this Part when carrying out its duties under section 77(1) of the Act (general functions of local authorities in relation to water quality).

• (2) The local authority must discharge the obligation in paragraph (1) by establishing a monitoring programme which consists of either—

• (a) the collection and analysis of discrete water samples;

• (b) measurement recorded by a continuous monitoring process; or

• (c) a combination of the methods in sub-paragraphs (a) and (b).

• (3) Monitoring programmes may include either or both of—

• (a) inspections of records of the functionality and maintenance status of equipment;

• (b) inspections of the catchment area, water abstraction, treatment, storage and distribution infrastructure.

Further distribution of supplies from water undertakers or water supply licensees

8

Where water is supplied by a water undertaker or a water supply licensee and is then further distributed by a person other than a water undertaker or a water supply licensee, the local authority must carry out any monitoring which the risk assessment shows to be necessary.

Large supplies and supplies as part of a commercial or public activity

9

• (1) This regulation applies to a private water supply, other than that specified in regulation 8, that—

• (a) supplies an average daily volume of water of 10m3 or more; or

• (b) supplies water as part of a commercial or public activity.

• (2) The local authority must monitor a private water supply falling within this regulation in accordance with Schedule 2 and carry out any additional monitoring that the risk assessment shows to be necessary.

Supplies to a single dwelling

10

• (1) This regulation applies to a private water supply to a single dwelling not used as part of a commercial or public activity (in which case regulation 9 applies) or as part of a domestic tenancy (in which case regulation 11 applies).

• (2) Where this regulation applies, the local authority—

• (a) may monitor the supply in accordance with the requirements in regulation 11(1); and

• (b) must do so if requested to do so by the owner or occupier of that dwelling.

Other private supplies including supplies as part of a domestic tenancy

11

• (1) In the case of a private water supply not covered by regulation 8, 9 or 10, the local authority must monitor for—–

• (a) conductivity;

• (b) enterococci;

• (c) Escherichia coli (E. coli);

• (d) hydrogen ion concentration;

• (e) turbidity;

• (f) any parameter in Part 1 or 2 of Schedule 1 identified in the risk assessment as being at risk of not complying with the concentrations or values in those Parts of that Schedule; and

• (g) anything else identified in the risk assessment as a potential danger to human health.

• (2) The local authority must carry out the monitoring required by this regulation at least every 5 years and more frequently if the risk assessment shows this to be necessary.

Monitoring of radioactive substances: general

12

• (1) A local authority must monitor each private water supply in its area (other than a supply to which regulation 13 applies) for the parameters contained in the radioactive substances parameters table in accordance with this regulation and Schedule 3.

• (2) In this regulation and Schedule 3, “the radioactive substances parameters table” means Table D in Part 3 of Schedule 1.

• (3) Where a local authority is satisfied that a parameter in the radioactive substances parameters table is not likely to be present in a private water supply in its area in concentrations which could exceed the prescribed concentration or value for the relevant parameter in that table, the local authority may, for such a time as it sees appropriate, decide to exclude the parameter in question from the monitoring duty in paragraph (1).

• (4) A decision under paragraph (3) must be made—

• (a) on the basis of representative surveys, monitoring data or other reliable information (including any risk assessment carried out in accordance with regulation 6); and

• (b) taking into account any guidance issued by the Welsh Ministers.

• (5) The local authority must provide the Welsh Ministers with the grounds for its decision under paragraph (3) and the necessary documentation supporting the decision (including the findings of any surveys, monitoring or assessments carried out in accordance with paragraph (4)(a)).

• (6) The Welsh Ministers must publish, in such a manner as they consider appropriate, the grounds for a decision under paragraph (3) and the documentation provided under paragraph (5) supporting the decision.

• (7) Where—

• (a) a decision has previously been made under paragraph (3), and

• (b) the local authority is no longer satisfied that the basis for the decision exists,

the exclusion from monitoring under paragraph (3) will no longer apply and the local authority must inform the Welsh Ministers in writing accordingly.

• (8) In case of naturally occurring radionuclides, where previous results (including representative surveys, monitoring data or other reliable information) show that the concentration of radionuclides in a supply within a local authority’s area is stable, the minimum sampling and analysis frequencies are to be decided by the local authority, and confirmed by notice in writing to the Welsh Ministers, taking into consideration the risk to human health.

Monitoring of radioactive substances: supplies to specified single dwellings

13

• (1) This regulation applies to a private water supply to a single dwelling not provided as part of a commercial or public activity or as part of a domestic tenancy.

• (2) A local authority may monitor a supply falling within paragraph (1) for the parameters contained in Table D in Part 3 of Schedule 1 in accordance with Schedule 3 and Part 3 of Schedule 4, and must do so if requested to do so by the owner or occupier.

Sampling and analysis

14

• (1) When a local authority monitors a private water supply it must take a sample—

• (a) if the water is supplied for domestic purposes, from a tap normally used to supply water for human consumption, and which, if there is more than one tap, is representative of the water supplied to the premises;

• (b) if the water is used in a food production undertaking, at the point at which it is used in the undertaking;

• (c) if the water is supplied from a tanker, at the point at which it emerges from the tanker;

• (d) in any other case at a suitable point.

• (2) A random daytime sample of one litre volume must be taken from a consumer’s tap without prior flushing for the purpose of sampling for the copper, lead and nickel parameters.

• (3) Sampling under this regulation—

• (a) for chemical parameters in the distribution network must be undertaken in accordance with ISO 5667-5, other than where the sample is taken from a consumer’s tap;

• (b) for microbiological parameters must be undertaken in accordance with—

• (i) EN ISO 19458 sampling purpose A in the distribution network; and

• (ii) EN ISO 19458 sampling purpose B at the consumer’s tap.

• (4) The local authority must ensure that the sample is analysed in accordance with Schedule 4.

New supplies

15

• (1) Where a local authority becomes aware of a private water supply that is to be, or is being, used for the first time (or for the first time after being out of use for a period of 12 months or more), the requirements of regulation 6 to 14 and 16 to 19 must be complied with as soon as reasonably practicable.

• (2) A private water supply must not be brought into use or used until the local authority is satisfied that the supply does not constitute a potential danger to human health.

Records

16

• (1) A local authority must make and keep records in respect of every private water supply in its area in accordance with Schedule 5.

• (2) By 31 January of every year, a local authority must—

• (a) send the Chief Inspector of Drinking Water a copy of the records referred to in paragraph (1); and

• (b) upon request, send the Welsh Ministers a copy of those records.

PART 3 — Action in the event of failure

Provision of information

17

If a local authority considers that a private water supply in its area is a potential danger to human health it must promptly take appropriate steps to ensure that people likely to consume water from it—