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Severn Trent Water Limited – Ompton works

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

Reference: SVT-2024-00001

Version Number: 1

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:

Asset Name

Reference

Ompton works

T0155

Ompton Borehole 1

A0428

Ompton Borehole 2

A0429

Ompton Borehole 4

A0430

Ompton Borehole 5

A0431

Diamond Avenue, Miskhill and Newark supply system

YEM18

Nottingham Central supply system

YEM10

Nottingham City North supply system

YEM09

Nottingham East and Nottinghamshire East supply system

YEM11

Strelley supply system

YEM12

Table 1: List of assets affected and associated reference numbers

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 2016 (as amended) (‘the Regulations’) from the Company dated 10 November 2023, which states that there is or has been a significant risk of supplying water from Ompton works (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

Inadequate treatment to remove microbiological contamination.

Viruses

T0155-316-T-H035-H036-H036

Inadequate treatment to remove microbiological contamination.

Enterococci

T0155-316-T-H035-C003-2Q2

Inadequate treatment to remove microbiological contamination.

Escherichia coli (E. coli)

T0155-316-T-H035-C002-23Q

Inadequate treatment to remove microbiological contamination.

Colony counts after 72 hours at 22°C

T0155-316-T-H035-C007-2C0

Inadequate treatment to remove microbiological contamination.

Total coliforms

T0155-316-T-H035-C001-23P

Inadequate treatment to remove microbiological contamination.

Clostridium perfringens

T0155-316-T-H035-C004A-2YX

Inadequate treatment to remove microbiological contamination.

Cryptosporidium

T0155-316-T-C111-C111-24U

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. Enhanced operational monitoring for microbiological parameters, including Cryptosporidium.
    Ongoing for the duration of this Notice.
  2. Take all reasonable steps to protect public health in the event of a detection of microbiological or Cryptosporidium contamination.
    Date: Ongoing for the duration of this Notice.
  3. Operation of all processes within defined normal operating ranges with appropriate triggers, responses and contingency procedures.
    Date: Ongoing for the duration of this Notice.
  4. Continuously review all critical control points and mitigation measures for the duration of this notice.
    Date: Ongoing for the duration of this Notice.
  5. Liaise as agreed with local health authorities
    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. Design appropriate water treatment to address the identified risk of microbiological contamination in the raw water.
    Date: 31 January 2024.
  2. Implement appropriate water treatment to address the identified risk of microbiological contamination in the raw water, as designed in measure b(1).
    Date: 31 May 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: 31 March 2024.
  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 Ompton works and its associated supply systems, or not to so supply unless the specified conditions below are satisfied:

  1. Until appropriate water treatment is in place, to address the identified risk of microbiological contamination of the raw water.
    Date: 31 May 2024

(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 of the design of appropriate water treatment to address the risk of microbiological contamination in the raw water, as specified in measure b(1).
    Date: 29 February 2024.
  3. Confirmation of the implementation of appropriate water treatment to address the risk of microbiological contamination in the raw water, as specified in measure b(2).
    Date: 30 June 2024.
  4. Submit the audit strategy for auditing the effectiveness of the measures, as specified in measure (c)1.
    Date: 30 April 2024.
  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: 31 July 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).
  4. Contravention of a regulation 28(4)(d) requirement is an offence under regulation 33(1). If guilty of such an offence, the Company is liable on summary conviction, or on conviction on indictment, to a fine. Under regulation 33(2) it is a defence for the Company to show that it took all reasonable steps and exercised all due diligence to avoid the commission of the offence.

 Signed

Nicholas Adjei
Deputy Chief Inspector, on behalf of the Secretary of State for Environment, Food and Rural Affairs
12 January 2024
Reference: SVT-2024-00001

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