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Severn Trent Water Limited – Ruddington Discolouration

Notice under regulation 28(4) of the Water Supply (Water Quality) Regulations 2016 (as amended)

Reference: SVT-2021-00008

Version Number: 3

Water undertaker as appointed under section 6 of the Water Industry Act 1991 (as amended): Severn Trent Water Limited, with registered number 02366686 (hereinafter called ‘the Company’).

Assets Affected:

  • Ruddington Water Quality Zone (ZNT17) (previously Oxton Water Quality Zone (ZNT08))

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 2016 (as amended) (‘the Regulations’) from the Company dated 18 November 2020, which states that there is or has been a significant risk of supplying water from Oxton Water Quality Zone (ZNT08) (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 Secretary of State, under regulation 28(4) for the assets listed above, for risks associated with:

Description of Risk

Hazard/ Hazardous Event/ Parameter

Hazard I D

Iron (total)

ZNT08-1020-D-H057-A022-01A

Supply of drinking water with elevated iron above PCV.

Discolouration

ZNT08-1020-D-H057

Supply of discoloured drinking water for Regulation 4 purposes.

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.
  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. Filters to be changed at least once every two weeks at each affected property.
    Date: Ongoing for the duration of this Notice
  2. Keep under review the frequency of the filter changes to ensure aesthetically acceptable water is always available.
    Date: Ongoing for the duration of this Notice
  3. Record and monitor customer contacts at appropriate detail and investigate where appropriate.
    Date: Ongoing for the duration of this Notice
  4. Regulatory sampling from the ZNT17 Ruddington Water Quality Zone.
    Date: Ongoing for the duration of this Notice
  5. Additional monthly operational sampling within the affected area of DMA 11/171 for Iron, Manganese and Turbidity parameters.
    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 most appropriate solution to mitigate against the risks of discoloured water in DMA 11/171 of the ZNT17 Water Quality Zone.
    Date: Complete
  2. Confirm completion of design and expected start date for construction of the agreed solution.
    Date: 07 July 2023
  3. Confirm completion of the agreed solution.
    Date: 23 February 2024

(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 Ruddington Water Quality Zone (ZNT17) , 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 the plan with timescales for the delivery of the chosen solution.
    Date: Complete
  3. Confirm completion of the implementation of the chosen solution for mitigating the risk of discolouration.
    Date: 22 March 2024
  4. Submit the audit strategy for auditing the effectiveness of the measures, as specified in measure (c)1.
    Date: Complete
  5. Submit any revisions of the audit strategy produced under measure (c)2.
    Date: Within 1 month of a revision
  6. 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
  7. Submit a satisfactory completion report accompanied by a revised regulation 28(1) report with Board level Director sign-off.
    Date: 21 March 2025

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 Secretary of State, 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 Secretary of State for Environment, Food and Rural Affairs
20 June 2023
Reference: SVT-2021-00008

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