Current improvement programmes

Notice of Regulation: Alderley Treatment Works



Bristol Water : AMP7 Alderley Phosphate

T01 – Alderley Treatment Works
Y01 – Alderley Supply System

DWI Reference: BRL-2020-00001


  1. has received a report from Bristol Water (the “Company”) dated 01 October 2019 (the “Report”) which states that there is or has been a significant risk of supplying water from Alderley treatment works that could constitute a potential danger to human health.
  2. GIVES NOTICE to the Company under regulation 28(4) of the Water Supply (Water Quality) Regulations 2016 (as amended) that it must satisfy the following requirements:

For risks associated with:

  • Lead


(a) to maintain the following measures for the period specified:

  1. Opportunistic replacement of lead communication pipes during planned mains renewal works.
    Date: Ongoing for the duration of the notice.
  2. Lead communication pipes to be replaced at properties where lead sample results are found to be greater than or equal to 8 µg/l.
    Date: Ongoing for the duration of the notice.
  3. Continuation and continuous development of the Company’s Lead Strategy.
    Date: Ongoing for the duration of the notice.

(b) to review, revise and/or make operational the following measures, by the date specified below:

  1. Installation of phosphate dosing at Alderley Treatment Works.
    Date: By 31 March 2022
  2. Optimisation of phosphate dosing at Alderley Treatment Works to facilitate compliance with the lead standard in the Alderley Supply System.
    Date: By 31 March 2023

(c) to audit whether the measures have been effective by the following means:

  1. Define and keep under continuous review an audit strategy to monitor the effectiveness of the above measures.
    Date: By 31 May 2020 and as required.
  2. Implement the audit strategy defined in (c)1.
    Date: For the duration of the Notice.

(d) 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 risk of supplying water that would constitute a potential danger to human health:

  1. Provide a progress report annually by 31 January and against the following milestones:
    • Provide a copy of the audit strategy.
      Date: By 30 June 2020 and updates as required.
    • Confirm completion of the installation of phosphate dosing at Alderley treatment works.
      Date: By 30 April 2022
  2. Review the risk assessment for Alderley treatment works as required by regulation 27(3) and subsequently submit a revised regulation 28 report accompanied by a signed board level declaration.
    Date: From time to time and by 21 May 2022
  3. Submit a satisfactory completion report.
    Date: 30 April 2024

Failure by the Company to comply with this Notice may result in enforcement proceedings under section 18 of the Water Industry Act 1991.

Signed by authority of the Secretary of State
Milo Purcell
Deputy Chief Inspector
01 May 2020
DWI Reference: BRL-2020-00001
Version 1