Notice under regulation 28(4) of the Water Supply (Water Quality) Regulations 2016 (as amended)
Version Number: 3
- T086 – Sawston Mill (Duxford Airfield)
- Bluntisham Supply System
- Cambridge City North Supply System
- Cambridge City South Supply System
- Cambridge North Supply System
- Cambridge South Supply System
- Cambs Rural Supply System
- Coton Supply System
- Sawston Supply System
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 dated 01 October 2021, which states that there is or has been a significant risk of supplying water from Sawston Mill (Duxford Airfield) treatment works (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
Presence of per- and poly fluoroalkyl (PFAS) substances in the source water.
- 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.
(a) To maintain the following measures for the period specified in each case:
- Monitor for PFAS substances in the source water, at a frequency of once per week when the Duxford Airfield borehole is in operation.
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:
- Design a solution to mitigate the risks from PFAS substances in the source water.
Date: 31 July 2022
- Implement the solution designed in step (b)1
Date: 31 December 2022
(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: Complete – 30 April 2022
- 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 Sawston Mill (Duxford Airfield), or not to so supply unless the specified conditions below are satisfied:
- The concentrations of PFAS substances in the source water are controlled appropriately, to ensure unwholesome water cannot be supplied.
Date: Ongoing for the duration of this notice
(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.
- Provide a report detailing the chosen long-term solution, delivered under measure (b)1.
Date: 31 August 2022
- Confirm completion of the long-term solution under measure (b)2.
Date: 31 January 2023
- Submit the audit strategy for auditing the effectiveness of the measures, as specified in measure (c)1.
Date: Complete – 31 May 2022
- 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 satisfactory completion report accompanied by a revised regulation 28(1) report with Board level Director sign-off.
Date: 31 January 2024
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).
- 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.
Deputy Chief Inspector, on behalf of the Secretary of State for Environment, Food and Rural Affairs
26 July 2022
Reference: CAM-2022-00001 (V3)