Northumbrian Water Limited – Westerton Service Reservoir Abandonment with installation of new pumping station
Notice under regulation 28(4) of the Water Supply (Water Quality) Regulations 2016 (as amended)
Reference: NES-2024-00007
Version Number: 1
Water undertaker as appointed under section 6 of the Water Industry Act 1991 (as amended): Northumbrian Water Limited, with registered number 02366703 (hereinafter called ‘the Company’).
Assets Affected:
- Westerton Service Reservoir (R0001940)
Details of this Notice:
- 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 2 October 2024, which states that there is or has been a significant risk of supplying water from Westerton Service Reservoir (and associated assets as applicable) that could constitute a potential danger to human health or could be unwholesome.
- 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 |
|---|---|---|
|
To address the risk of ingress contamination and microbial growth. |
Total Coliforms (Confirmed) |
NNE-STO- R0001940-C001_CFH |
|
To address the risk of ingress contamination and microbial growth. |
E. coli (Confirmed) |
NNE-STO- R0001940-C002_CFH |
|
To address the risk of ingress contamination and microbial growth. |
Clostridium Perfringens (Confirmed) |
NNE-STO- R0001940-C004A_CFH |
|
To address the risk of ingress contamination and microbial growth. |
Enterococci (Confirmed) |
NNE_ STO_ R0001940_C003_CFH |
|
To address the risk of ingress contamination and microbial growth. |
Colony Counts at 22oC |
NNE_ STO_ R0001940_C007_CFH |
|
To address the risk of ingress contamination and microbial growth. |
Residual Disinfectant – Total |
NNE_ STO_ R0001940_C010_CFH |
|
To address the risk of ingress contamination and microbial growth. |
Residual Disinfectant – Free |
NNE_ STO_ R0001940_C009_CFH |
- 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:
- Operate all service reservoirs and tanks in accordance with current company policy, standards and procedures aligning recognised standards of good practice.
Date: Ongoing for the duration of this Notice - Enhanced microbiological monitoring where the Service Reservoir has not been inspected in accordance with the company’s policy, including where new risks to water quality from the asset are identified
Date: Ongoing for the duration of this Notice - Complete frequent service reservoir and booster station maintenance check visits and escalate issues that present a water quality risk in accordance with company policy and procedures.
Date: Ongoing for the duration of this Notice - Proactive grounds maintenance on all service reservoir sites and at outflow discharge points.
Date: Ongoing for the duration of this Notice - Maintain records of remedial work completed on all cells.
Date: Ongoing for the duration of this Notice - Maintain contingency plans to protect human health in the event of a risk associated with drinking water quality, which should include liaison with local authorities and Public Health England.
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:
- Complete the construction, installation and commissioning of the agreed solution as specified under b(2) in order to enable isolation of Westerton Service Reservoir
Date: 31 March 2026 - Carry out the disconnection of Westerton Service Reservoir from the network
Date: 30 June 2026
(c) To audit whether the measures have been effective by the following means:
- Define an audit strategy to monitor the effectiveness of the measures specified in sections (a) and (b).
Date: 31 March 2025 - 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 Westerton Service Reservoir, or not to so supply unless the specified conditions below are satisfied:
- 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:
- Provide a progress report annually.
Date: by 31 January each year. - Submit the audit strategy for auditing the effectiveness of the measures, as specified in measure (c)1.
Date: 30 April 2025 - Submit any revisions of the audit strategy produced under measure (c)2.
Date: Within 1 month of a revision - 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 - Submit a report confirming the completion of the construction, installation and commissioning of the programme of works as specified under measure (b) 1.
Date: 30 April 2026 - Submit a report confirming the removal of Westerton SR from supply as specified under measure (b)2.
Date: 31 July 2026
- Submit a satisfactory completion report accompanied by a revised regulation 28(1) report with Board level Director sign-off.
Date: 31 July 2027
Further Details of this Notice:
- Any product or substance used as a result of the requirements in this Notice must comply with regulation 31.
- 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.
- 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).
Nicholas Adjei
Deputy Chief Inspector, on behalf of the Secretary of State for Environment, Food and Rural Affairs
27 January 2025
Reference: NES-2024-00007