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Dwr Cymru Cyfyngedig – Moreton Eye Discolouration

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

Reference: DWR-2025-00004

Version Number: 1

Water undertaker as appointed under section 6 of the Water Industry Act 1991 (as amended): Dwr Cymru Cyfyngedig, with registered number 02366777 (hereinafter called ‘the company’).

Assets Affected:

Asset Name

Reference

Hereford Central / North

Z2058H52

Whitbourne

Z2061H68

Table 1: List of assets affected and associated reference numbers

Details of this Notice:

  1. The Drinking Water Inspectorate (‘the Inspectorate’) has received a regulation 28(1) report of the Water Supply (Water Quality) Regulations 2018 (‘the Regulations’) from the company dated 20 September 2025, which states that there is or has been a significant risk of supplying water from Hereford Central / North WSZ and Whitbourne WSZ (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

Potential for Discoloured water (brown/ black/ orange) customer complaints

Discolouration

D100931

D109267

Potential for elevated levels of Iron due to its presence in the raw water, treatment effectiveness or network

Iron

D128005

D129988

Potential for elevated levels of Turbidity due to its presence in the raw water, treatment effectiveness or network

Turbidity

D128013

D66124

Potential for elevated levels of Manganese due to its presence in the raw water, treatment effectiveness or network

Manganese

D128006

D129989

Table 2: Table of the hazards, hazardous events, and/or parameters covered by this Notice, including the Hazard I D numbers and the description of risks

  1. 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. Continuous turbidity (NTU) monitoring to facilitate proactive WQ assessment to be used to develop additional operational interventions if needed.
  2. Continue the planned maintenance flushing and filter installation programme in the local area.
  3. Monitor customer contacts and respond in accordance with company procedures.
  4. Undertake regulatory and enhanced monitoring as defined within section (c)1 from Hereford Central / North WSZ (H52) and Whitbourne WSZ (H68).

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

  1. Review and update the maintenance action plan for H68 Pole Farm and H52 Yarpole.
    Date: 28 February 2026
  2. Outline the design of mains replacement to address the Water Quality and sufficiency risks in the local area.
    Date: 31 March 2026
  3. Confirm the design and delivery programme of 13.8km mains replacement in the H68 Pole Farm and H52 Yarpole LCAs to address high burst frequencies, risk of water quality failures and discolouration issues in the local area. Ensure the programme is broken down into regular check points to monitor progression.
    Date: 30 June 2026
  4. Complete the construction and commissioning of mains replacement as per the delivery programme outlined in step (b)3.
    Date: 31 December 2027

(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: 31 March 2026
  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 Hereford Central/North WSZ and Whitbourne WSZ, 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. Provide a report on the review as described in step (b)1.
    Date: 31 March 2026
  3. Provide the outline design, as described in step (b)2.
    Date: 30 April 2026
  4. Provide a report on the design and delivery programme as described in step (b)3.
    Date: 31 July 2026
  5. Provide an interim update on the construction and commissioning of mains replacement as described in (b)4.
    Date: 30 June 2027
  6. Confirm completion of the construction and commissioning of mains replacement as described in step (b)4.
    Date: 31 January 2028
  7. Submit the audit strategy for auditing the effectiveness of the measures, as specified in measure (c)1.
    Date: 30 April 2026
  8. Submit any revisions of the audit strategy produced under measure (c)2.
    Date: Within 1 month of a revision
  9. 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
  10. Submit a satisfactory completion report accompanied by a revised regulation 28(1) report with Board level Director sign-off.
    Date: 31 January 2029

Further Details of this Notice:

  1. Any product or substance used as a result of the requirements in this Notice must comply with regulation 31.
  2. Under regulation 28(6) the Inspectorate, on behalf of the Welsh Ministers, may by notice served on the company, revoke or vary this Notice.
  3. 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
10 February 2026
Reference: DWR-2025-00004

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