Southern Water Services Limited – Brede and Beauport Water Supply Works

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

Reference: SRN-2020-00007

Version Number: 3

Water undertaker as appointed under section 6 of the Water Industry Act 1991 (as amended): Southern Water Services Limited, with registered number 02366670 (hereinafter called ‘the Company’).

Assets Affected:

• TS010 – Brede WSW
• TS011 – Beauport Hastings WSW
• Y003 – Hastings Supply System

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 19 November 2018, which states that there is or has been a significant risk of supplying water from Brede Water Supply Works and Beauport Hastings Water Supply 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
Ingress route and failure of treatment process	Clostridium perfringens	31263 and 31201
Ingress route and failure of treatment process	E. coli	31267 and 31204
Ingress route and failure of treatment process	Enterococci	31266 and 31205
Ingress route and failure of treatment process	Total Coliforms	31265 and 31203
Failure of treatment poses risk to wholesomeness	Manganese	31305 and 31243
Failure of treatment poses risk to wholesomeness	Turbidity	69678 and 69676

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.

3. 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. Maintain and operate existing works treatment in accordance with Company standards.
   Date: Ongoing for the duration of this Notice
2. Liaise with Public Health England and local authorities in the event of any breach of a health based standard.
   Date: Ongoing for the duration of this Notice
3. Ensure regular checks of the RGFs.
   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. Beauport WSW: Filsham UGS rising main.
   • a) Ensure Filsham UGS rising main is disconnected from raw water main.
     Date: Complete
   • b) Commission Filsham UGS rising main is disconnection from raw water main.
     Date: Complete
2. Beauport WSW: Auto coagulation units.
   • a) Replace auto coagulation units.
     Date: 31 December 2023
   • b) Commission replaced auto coagulation units.
     Date: 30 June 2024
3. Beauport WSW: Wash water return from the RGFs and Kalsep microfiltration plant and compliance with Badenoch and Bouchier.
   • a) Implement process improvement to ensure wash water return from the RGFs and Kalsep microfiltration plant are compliant with Badenoch and Bouchier.
     Date: 30 June 2023
   • b) Commission process improvement to ensure wash water return from the RGFs and Kalsep microfiltration plant are compliant with Badenoch and Bouchier.
     Date: 31 December 2023
4. Beauport WSW: Polyacrylamide dosing system.
   • a) Complete review of polyacrylamide dosing system and implement required improvements.
     Date: 31 March 2025
   • b) Commission required improvements to polyacrylamide dosing system.
     Date: 30 September 2025
5. Beauport WSW: Operation of the RGFs and compliance with Badenoch and Bouchier.
   • a) Review operation of the RGFs and implement improvements to ensure that their operation is compliant with Badenoch and Bouchier.
     Date: 31 March 2025
   • b) Commission the implemented improvements to ensure that the operation of the RGFs is compliant with Badenoch and Bouchier.
     Date: 30 September 2025
6. Brede WSW: Install backflow prevention on clear water tank emergency overflow.
   Date: Complete
7. Brede WSW: Review current cryptosporidium monitoring requirements post UV installation and implement recommendations.
   Date: Complete
8. Brede WSW: Complete SEMD review of non-production well and implement improvements.
   Date: Complete
9. Brede WSW: Online turbidity monitoring on raw water.
   • a) Review requirement for online turbidity monitoring on raw water and install instruments as required.
     Date: Complete
   • b) Commission online turbidity monitoring on raw water and installed instruments.
     Date: Complete
10. Brede WSW: Turbidity monitoring on the outlet of the secondary filters.
    • a) Review turbidity monitoring on the outlet of the secondary filters and implement improvements.
      Date: Complete
    • b) Commission implemented improvements to turbidity monitoring on the outlet of the secondary filters.
      Date: Complete
11. Brede WSW: Carry out a review of the existing treated water run to waste arrangement and implement improvements identified.
    Date: Complete
12. Brede WSW: Sampling arrangements.
    • a) Review the existing sampling arrangements and implement the improvements required.
      Date: Complete
    • b) Commission the implemented improvements to the sampling arrangements.
      Date: Complete
13. Brede WSW: Filter structures and media.
    • a) Review the condition of the filter structures and media.
      Date: 31 December 2023
    • b) Refurbish/ Renew the filter structures and media.
      Date: 31 March 2025
    • c) Commission the refurbished/renewed filter structures and media.
      Date: 30 September 2025
14. Brede WSW: Sodium hydroxide dosing system.
    • Review the condition and operation of the sodium hydroxide dosing system and implement the improvements required to increase resilience.
      Date: 31 March 2025
    • b) Commission the implemented improvements to the sodium hydroxide dosing system.
      Date: 30 September 2025
15. Brede WSW: Operation of the filters and compliance with Badenoch and Bouchier.
    • a) Implement pipework and control modifications to ensure that operation of the filters complies with Badenoch and Bouchier.
      Date: 31 March 2025
    • b) Commission pipework and control modifications of the filters to ensure their operation complies with Badenoch and Bouchier.
      Date: 30 September 2025
16. Brede WSW: Filter backwash pumps compliance with Badenoch and Bouchier.
    • a) Review current operation of filter backwash pumps and implement improvements identified to meet Badenoch and Bouchier.
      Date: 31 March 2025
    • b) Commission implemented improvements on filter backwash pumps to meet Badenoch and Bouchier.
      Date: 30 September 2025

(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 Brede WSW and Beauport Hastings WSW, 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. Completion of treatment works upgrades due at Brede WSW in 2021.
   Date: Complete
3. Commissioning report for all completed measures prior to December 2022.
   Date: Complete
4. Completion report for Brede sampling arrangements.
   Date: Complete
5. Completion report for upgrades due at Beauport WSW by 31 March 2023.
   Date: Complete
6. Commissioning report for sampling arrangement upgrades due at Brede WSW by 30 June 2023.
   Date: Complete
7. Completion report for wash water return from the RGFs and Kalsep microfiltration plant and compliance with Badenoch and Bouchier.
   Date: 31 July 2023
8. Commissioning report for wash water return from the RGFs and Kalsep microfiltration plant and compliance with Badenoch and Bouchier.
   Date: 31 January 2024
9. Completion report for auto coagulation units at Beauport.
   Date: 31 January 2024
10. Condition report for Brede filter structures and media.
    Date: 31 January 2024
11. Commissioning Report for auto coagulation units at Beauport
    Date: 31 July 2024
12. Completion of upgrades due at Brede WSW and Beauport WSW by 31 March 2025.
    Date: 30 April 2025
13. Commissioning report for upgrades due at Brede WSW and Beauport WSW by 30 September 2025.
    Date: 31 October 2025
14. Submit the audit strategy for auditing the effectiveness of the measures, as specified in measure (c)1.
    Date: Complete
15. Submit any revisions of the audit strategy produced under measure (c)2.
    Date: Within 1 month of a revision
16. 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
17. Submit a satisfactory completion report accompanied by a revised regulation 28(1) report with Board level Director sign-off.
    Date: 31 October 2026

Further Details of this Notice:

4. Any product or substance used as a result of the requirements in this Notice must comply with regulation 31.
5. 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.
6. 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
12 May 2023
Reference: SRN-2020-00007 V3