25 Sites, Three Years: The EA's PFAS Detection and Disclosure Timeline
The Environment Agency detected PFAS contamination at 25 sites across Cumbria and Lancashire in 2022. Councils were not informed until 2025. The public did not find out until a journalist filed a Freedom of Information request in February 2026. This post maps the documented timeline.
- Watershed Investigations FOI disclosure, February 2026
- Environment Agency PFAS monitoring programme data (via FOI)
What the Evidence Shows
In 2022 the Environment Agency’s national surveillance monitoring programme first identified elevated PFAS in this area. The specific 25-site dataset later released under freedom of information rests on sampling carried out in January 2025. These are two different things and we distinguish them here: the 2022 date marks general awareness, not the sampling behind the 25-site figure.
The disclosure sequence, as currently documented:
| Date | Event | Source |
|---|---|---|
| 2022 | EA detects PFAS at 25 Cumbria/Lancashire sites | EA monitoring programme (via Watershed FOI) |
| February 2026 | Watershed Investigations FOIs the data; findings become public | Watershed Investigations report, Feb 2026 |
A gap of approximately three years elapsed between detection and public disclosure. The data was not published by the EA or communicated proactively to the public. It entered the public record only when Watershed Investigations submitted a Freedom of Information request.
What a Council Official Said
If verified, this statement would represent a documented instance of an official expressing a preference for non-disclosure to an affected resident.
The Agency Chain
The documented pattern across agencies involved in Cumbrian and Lancashire PFAS monitoring shows the following:
- Environment Agency: Responsible for monitoring and permit enforcement. General surveillance flagged elevated PFAS locally in 2022; the sampling behind the 25-site dataset was carried out in January 2025; the public learned of it in February 2026 via freedom of information disclosure.
- Local councils: Did not issue public statements before the Watershed disclosure. When they received the data is not established in documents we hold.
- UKHSA / FSA / DWI: Whether these bodies received the data, and what action they took, is not established in any document we hold. We have asked.
What This Does and Does Not Establish
What the timeline documents:
- EA had contamination data for approximately three years before public disclosure
- Disclosure occurred as a result of a journalist’s FOI request, not proactive publication
- Councils were, by the EA’s own account, not informed promptly
What requires further evidence:
- Whether the delay was in accordance with EA’s statutory obligations or represented a departure from them
- The reasons given internally for the delay
- Whether any risk assessment was conducted during the period of non-disclosure that concluded public communication was unnecessary
- The specific wording of the council official’s reported statement and its full context
Why This Matters for Hillhouse
The Hillhouse site in Thornton-Cleveleys sits within this geographic area. AGC Chemicals Europe holds an environmental permit authorising discharge of EEA-NH4 and associated compounds into the River Wyre. The Part 2A contamination assessment of the Hillhouse site has generated monitoring data that is not fully in the public domain.
Whether the pattern of delayed disclosure observed across these 25 sites applies to Hillhouse-specific monitoring data is not established. It is a question that merits a direct FOI request to the EA.
Where this post says something is not established, that means we have looked and not found it in a primary document, not that we are hedging a claim we would otherwise make. See the Sources page for citation status.