Sampling by Government of PFAS in private water supplies (revised)
Introduction- PFAS and its distribution in Jersey
PFAS chemicals are highly complex and extremely long lasting in the environment. They have been termed as the ‘forever chemicals’. Scientific understanding of the behaviour and toxicity of these chemicals is rapidly developing amidst global concern.
There are hundreds of PFAS chemicals that have derived from a multitude of uses, principally as a water and oil proofing agent that cover a large array of products in daily use (from pizza boxes to waterproofing materials).
In Jersey, PFAS (mainly PFOS and PFOA) was historically used in fire-fighting foam, principally at the airport. The use stopped in the 1990s. This has left a legacy in groundwater that extends westwards from the airport fire-training ground down into the aquifer in St Ouen’s Bay. A further area extends south of the airport into the Pont Marquet water catchment.
Background levels of PFAS have been recorded throughout the Island, as common with many other countries, and as a consequence to its wide use described above.
Due to changes in charging of the various PFAS analyses by the UK Laboratory, an adjustment to the previous Ministerial Decision of 27 July 2021 (Reference: MD-PE-2021-0040) is required. The UK Laboratory no longer offers separate analysis for purely PFOS and PFOA, rather they only offer the full analysis of the available and more extensive lists of PFAS determinands. This means that households outside of the main plume areas (St Ouen’s Bay or Pont Marquet) will be asked to contribute half the cost of sampling the more extensive list, rather than the difference between the PFOS/PFOA and the more extensive list as previously detailed in the former Ministerial Decision.
Current work and sampling
The Minister for the Environment established a Technical Officer Group to coordinate the PFAS work in Jersey. The Technical Officer Group publishes update reports and recommendations, including results from sampling.
Several of the recommendations relate to undertaking a hydrogeological survey of the St Ouen’s Bay and Pont Marquet catchments. Government Plan funding has been secured and the appointment of consultants to undertake the work is being progressed. Phase 1 of the survey will likely involve further sampling of streams and groundwater (boreholes and wells).
Further recommendations include establishing a procedure whereby private households/landlords are able to test their private water supplies. Due to the technical sampling procedures this needs to be done by experienced officers.
Due to the need for data by the Government as part of the general understanding and the hydrogeological survey mentioned above, the Minister for the Environment considers it practical to sample private water supplies and to fund/part-fund the analysis costs. This will only be for households/landlords whose properties are connected to private water supplies (e.g., boreholes and wells) to supply drinking water, on the following conditions.
- An application is made to the Environment Department by the household/landlord and that this is approved by the Technical Officer Group in advance of the sampling.
- Repeat samples of the same source will not normally be undertaken and will be at the discretion of the Technical Officer Group.
- If approved, the sampling will include:
- Sampling of the existing PFAS suite for sampling points outside of the St Ouen’s Bay or Pont Marquet PFAS plumes[1]. Half of the cost of the analysis) will be subsidised by Government.
- Sampling of the existing PFAS suite providing the sampling point is within the St Ouen’s Bay or Pont Marquet PFAS plumes1.The cost will be fully covered by Government.
Before making an application, households/landlords are advised to contact the Environmental Department (Tel: 01534 441600) to see whether previous sampling undertaken by the Technical Officer Group covers the area and thus negates the need for sampling.
In agreeing to the sampling, households/landlords agree to share the results with the PFAS Technical Officer Group and allow re-sampling, if needed, as part of ongoing work. Publication of results by the Technical Officer Group will not include details of the property or household, so that the exact location cannot be identified.
In approving and sampling a private water supply, the Government accepts no responsibility or liability for any further action as might arise from the results of the analysis for PFAS chemicals.
This Ministerial Decision will be reviewed after one year from publication. The decision to extend this subsidy is dependent on the extent and coverage of ongoing data collection.