Hafren Dyfrdwy Cyfyngedig – Concessionary Supplies

Notice under regulation 28(4) of the Water Supply (Water Quality) Regulations 2018

Reference: HDC-2022-00001

Version Number: 2

Water undertaker as appointed under section 6 of The Water Industry Act 1991 (as amended): Hafren Dyfrdwy Cyfyngedig, with registered number 03527628 (hereinafter called ‘the Company’). 

Assets Affected:

• ZCS01 Concessionary Supplies

Details of this Notice:

1. The Drinking Water Inspectorate (‘the Inspectorate’) has received a set of regulation 28(1) reports of the Water Supply (Water Quality) Regulations 2018 (‘the Regulations’) from the Company dated between 16 October 2010 and 04 October 2021, which state that there is or has been a significant risk of supplying water from ZCS01 Concessionary Supplies (and associated assets as applicable) that could constitute a potential danger to human health or could be unwholesome.
2. Consequently, this Notice is served on the Company by the Inspectorate on behalf of the Welsh Ministers, under regulation 28(4) for the assets listed above, for risks associated with:

Description of Risk	Hazard / Hazardous Event / Parameter	Hazard I D
To address the risk of microbial contamination of water supplied for Regulation 4 purposes	Total Coliforms	ZCS01-955-CO-H035-C001-23P
To address the risk of microbial contamination of water supplied for Regulation 4 purposes	E. coli	ZCS01-955-CO-H035-C002-23Q
To address the risk of microbial contamination of water supplied for Regulation 4 purposes	Clostridium perfringens	ZCS01-955-CO-H035-C004A-2YX
To address the risk of microbial contamination of water supplied for Regulation 4 purposes	Enterococci	ZCS01-955-CO-H035-C003-2Q2
To address the risk of microbial contamination of water supplied for Regulation 4 purposes	Cryptosporidium	ZCS01-955-CO-C111-C111-24U
To address the risks associated with low pH	pH	ZCS01-955-CO-A006-A006-F00

Table 1: Table of the hazards, hazardous events, and/or parameters covered by this notice, including the Hazard I D numbers and the description of risks.

3. The Company are required to satisfy the following requirements.

The date given is that until or by which the requirements must be maintained or satisfied, as appropriate.

Requirements:

(a) To maintain the following measures for the period specified in each case:

1. Quarterly maintenance of the point of use treatment plants in place at each affected property.
   Date: Ongoing for the duration of this notice.
2. Regulatory sampling from the ZCS01 Concessionary Supplies Water Quality Zone.
   Date: Ongoing for the duration of this notice.
3. Letters provided to customers annually to provide a reminder of the precautionary advice in place at each affected property.
   Date: Ongoing for the duration of this notice.

(b) To review, revise or make operational the following measures, by the dates specified in each case:

1. Review and confirm the appropriateness of the proposed solution to connect all properties to a mains water supply to secure wholesome drinking water.
   Date: Complete
2. Confirm completion of design and expected program of work, including start date for construction of the agreed solution.
   Date: Complete
3. Confirm completion of the construction and commissioning of the agreed solution.
   Date: 31 March 2026

(c) To audit whether the measures have been effective by the following means:

1. Define an audit strategy to monitor the effectiveness of the measures specified in sections (a) and (b).
   Date: Complete
2. Implement, and keep under continuous review, the audit strategy defined in measure (c)1.
   Date: Following completion of measure (c)1. onwards.

(d) Not to supply water for regulation 4(1) purposes from ZCS01 Concessionary Supplies, or not to so supply unless the specified conditions below are satisfied:

1. Not Applicable

(e) To provide the following information in the time and manner specified below to enable monitoring of progress towards the mitigation of the risks:

1. Provide a progress report annually.
   Date: by 31 January each year.
2. Confirmation and details of the chosen solution for connecting affected properties to a mains supply to secure wholesome drinking water.
   Date: Complete
3. Confirm completion of design and provide details of the programme of work with timescales for the delivery of the chosen solution.
   Date: Complete
4. Confirm completion of construction and commissioning of the proposed solution.
   Date: 30 April 2026
5. Submit the audit strategy for auditing the effectiveness of the measures, as specified in measure (c)1.
   Date: Complete
6. Submit any revisions of the audit strategy produced under measure (c)2.
   Date: Within 1 month of a revision
7. Submit a report in the event that any completed measures of this Notice need to be altered in any way, for any reason.
   Date: Ongoing for the duration of this notice.
8. Submit a satisfactory completion report satisfactory completion of the physical internal inspection, flood test, and any remedial work required, accompanied by a revised regulation 28(1) report with Board level Director sign-off.
   Date: 30 April 2027

Further Details of this Notice:

4. Any product or substance used as a result of the requirements in this Notice must comply with regulation 31.
5. Under regulation 28(6) the Inspectorate, on behalf of the Welsh Ministers, may by notice served on the Company, revoke or vary this Notice.
6. Failure by the Company to comply with this Notice may result in enforcement proceedings under section 18 of the Water Industry Act 1991 (as amended).

Signed

Nicholas Adjei
Deputy Chief Inspector, on behalf of the Welsh Ministers
8 November 2023
Reference: HDC-2022-00001 v2