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Severn Trent Water Limited – Network Storage Asset Health

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

Reference: SVT-2026-00030

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:

  • YEL01 – Northfield
  • YEL03 – Hagley
  • YEL04 – Birmingham Low
  • YEL05 – Birmingham Middle
  • YSEV11 – Mythe High
  • YSEV13 – RSA Supply
  • YSEV15 – Coventry
  • YSEV19 – RSA Warwickshire

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 between September 2024 and July 2025, which states that there is or has been a significant risk of supplying water from sites listed in annex 1 (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 example from Hewletts DSR3

Microbiological contamination due to asset deterioration

E. coli

R0356-623-S-H035-C002-23Q

Microbiological contamination due to asset deterioration

Total coliforms

R0356-623-S-H035-C001-23P

Microbiological contamination due to asset deterioration

Clostridium perfringens

R0356-623-S-H035-C004A-2YX

Microbiological contamination due to asset deterioration

Enterococci

R0356-623-S-H035-C003-2Q2

Microbiological contamination due to asset deterioration

Colony Counts

R0356-623-S-H035-C007-2CO

Microbiological contamination due to asset deterioration

Residual Disinfectant – Total Chlorine

R0356-623-S-H047-C010-1R3

Microbiological contamination due to asset deterioration

Residual Disinfectant – Free Chlorine

R0356-623-S-H047-C009-161

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. Operate all tanks in accordance with current company policy, standards and procedures, that align to recognised standards of good practice.
    Date: Ongoing for the duration of this Notice
  2. Maintain proactive external site inspections, grounds maintenance, site security and asset maintenance.
    Date: Ongoing for the duration of this Notice
  3. Regulatory sampling for bacteriological parameters from all listed DSR assets.
    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. Isolate Hewletts DSR3 from supply.
    Date: 31 December 2027
  2. Complete refurbishment of Hewletts DSR3.
    Date: 31 December 2030
  3. Complete refurbishment of Meriden DSR1.
    Date: 31 December 2030
  4. Isolate Meriden DSR2 from supply.
    Date: 31 January 2029
  5. Complete refurbishment of Meriden DSR2.
    Date: 31 December 2030
  6. Isolate Meriden DSR3 North and Meriden DSR3 South from supply.
    Date: 31 January 2028
  7. Complete refurbishment of Meriden DSR3 North and Meriden DSR3 South.
    Date: 31 December 2030
  8. Isolate Perry Bar DSR from supply.
    Date: 31 December 2029
  9. Complete refurbishment of Perry Bar DSR.
    Date: 31 December 2030
  10. Complete the rebuild of Frankley Pure Water Reservoir 1.
    Date: 31 December 2031

(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 January 2027
  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 sites in annex 1, 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 confirming the isolation of Hewletts DSR3.
    Date: 31 January 2028
  3. Provide a report detailing the completion of refurbishment works at Hewletts DSR3.
    Date: 31 January 2031
  4. Provide a report detailing the completion of refurbishment works at Meriden DSR1.
    Date: 31 January 2031
  5. Provide a report confirming the isolation of Meriden DSR2
    Date: 28 February 2029
  6. Provide a report detailing the completion of refurbishment works at Meriden DSR2.
    Date: 31 January 2031
  7. Provide a report confirming the isolation of Meriden DSR3 North and Meriden DSR3 South.
    Date: 28 February 2028
  8. Provide a report detailing the completion of refurbishment works at Meriden DSR3 North and Meriden DSR3 South.
    Date: 31 January 2031
  9. Provide a report confirming the isolation of Perry Barr DSR.
    Date: 31 January 2030
  10. Provide a report detailing the completion of refurbishment works at Perry Bar DSR.
    Date: 31 January 2031
  11. Provide a report detailing the completion of the rebuild of Frankley Pure Water Reservoir 1
    Date: 31 January 2032
  12. Submit the audit strategy for auditing the effectiveness of the measures, as specified in measure (c)1.
    Date: 28 February 2027
  13. Submit any revisions of the audit strategy produced under measure (c)2.
    Date: Within 1 month of a revision
  14. 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
  15. Submit a satisfactory completion report accompanied by a revised regulation 28(1) report with Board level Director sign-off.
    Date: 31 January 2033

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
6 November 2026
Reference: SVT-2026-00030


Annex 1 – Assets

  • R0356 – Hewletts DSR3
  • R0432 – Meriden DSR1
  • R0433 – Meriden DSR2
  • R0434 – Meriden DSR3 North Outlet
  • R0435 – Meriden DSR3 South Outlet
  • R0243 – Perry Bar DSR
  • R0708 – Frankley Pure Water Reservoir 1

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