Sources & Evidence

About Our Sources

All information on this site is sourced from publicly available documents. This page explains how we find, verify, and present information.

Official Government Reports

Environment Agency, Wyre Council, Food Standards Agency, DEFRA

Peer-Reviewed Scientific Research

Academic journals including Environmental Science & Technology, Chemosphere. Peer review means studies are independently checked by other scientists before publication.

Regulatory Submissions

Operator self-reported data via environmental permits (legal documents that set the rules for what a company can discharge into the environment) and official statements (e.g., AGC Chemicals Europe's Environment Agency permit submissions)

Independent Journalism

Guardian/Watershed Investigations, BBC reporting

Attribution Methodology

This site distinguishes between different types of data:

  • Operator disclosures: When data comes from an operator's own regulatory submissions (e.g., AGC's self-reported historical discharge figures), this is stated explicitly.
  • Independent testing: When data comes from independent academic or journalistic investigation, the source is cited.
  • Source not identified: When contamination has been detected but the source has not been confirmed (e.g., PFOS in local eggs), this is noted as an open question.

The Hillhouse industrial estate has been operated by multiple companies over decades, with shared infrastructure. This site does not attribute contamination to specific sources without evidence to support such attribution.

Verification and Correction Policy

This site aims to present accurate, verifiable information:

  • All source materials are public documents
  • Citations include document names and dates
  • Errors will be corrected and corrections noted on the changelog
  • Where claims cannot be verified, they are either qualified or not included
  • Where attribution is uncertain, this is stated explicitly

Site Transparency

  • This site is independently maintained by a local resident
  • It receives no funding from any organisation, law firm, commercial entity, or campaign group
  • It does not carry advertising
  • It uses no tracking cookies
  • All source documents cited are publicly available

Evidence Index

This index lists the sources behind the information on this site. Each entry shows where the data comes from and what it found. If you want to check a specific claim, you can find the original source here.

Note on attribution: Much of the documented PFAS data for this area comes from AGC Chemicals Europe's regulatory submissions, because they have disclosed significant information through Environment Agency permits. Some contamination in the area — such as PFOS found in eggs — has not been traced to a specific source. This index distinguishes between data from operator disclosures and data where the source is not identified or under investigation.

Regulatory Documents — Operator Disclosures

Environment Agency Permit EPR/BU5453IY/V004

Environment Agency. Environmental permit for AGC Chemicals Europe Ltd, Hillhouse Technology Enterprise Zone. Permit reference EPR/BU5453IY, various versions 2017-2025. EA Public Register.

Key information (from AGC's submissions): According to AGC's permit documentation, approximately 800 kg/year EEA-NH4 (a fluorochemical used as a replacement for PFOA in manufacturing) is discharged (reported in Chemical & Engineering News, May 2023 [article title/author to be confirmed]). The permit classifies the relevant discharge point (W2) as "uncontaminated" with no specific PFAS limit set. Historical discharge figures: Two figures appear in the public record — 178,000 kg (cited in Guardian/Watershed Investigations, September 2024, from FOI data) and approximately 145,000 kg (EA estimate, cited in Dalmijn et al., 2025). Both figures cover the full period under both ICI (1950s–1999) and AGC (1999–2012). The breakdown between operators has not been published, and the discrepancy between the two figures has not been explained. Neither should be treated as definitive. Note on W1 discharge: The W1 discharge point (where peak PFOA of 20,624 ng/L was detected) is shared by both AGC Chemicals Europe and Victrex PLC (Dalmijn et al., 2025). This figure reflects combined output from both operations.

Environment Agency EEA-NH4 Risk Assessment

Environment Agency. (2023, April). Environmental risk evaluation reports: PFAS – EEA-NH4 Summary. GOV.UK Publications.

Key information: EEA-NH4 classified as "very persistent" (it doesn't break down), "mobile" (it spreads easily through soil and water), and "reprotoxic category 2" (suspected of harming fertility or unborn children) by ECHA. No carcinogenicity assessment available.

UK Pollutant Release and Transfer Register (PRTR)

Department for Environment, Food and Rural Affairs. Pollutant Release and Transfer Register (PRTR) data sets. UK PRTR Database. Pollutant list: Annex II, Regulation (EC) No 166/2006 (retained in UK law).

Key information: The UK PRTR pollutant list (Annex II) contains 91 substances. PFOA, PFOS, EEA-NH4, and PFAS as a chemical class are not among them. The "perfluorocarbons (PFCs)" listed at row 9 are greenhouse gases (CF4, C2F6), not the PFAS family. "Fluorides" at row 83 covers inorganic fluorine compounds. The EU has moved to add PFAS to its E-PRTR; the UK has not followed as of February 2026.

Academic Papers — Independent Research

Dalmijn et al. Environmental Science & Technology Study

Dalmijn, J., Benskin, J.P., Salter, M.E., Sweetman, A.J., Halsall, C.J., Garnett, J., Cousins, I.T. (2025). Perfluoro(2-ethoxy-2-fluoroethoxy)-acetic Acid and Other Target and Suspect PFAS in the Vicinity of a Fluoropolymer Production Plant. Environmental Science & Technology. DOI: 10.1021/acs.est.5c07856. PMC12312159.

Key findings: Peak PFOA concentration 20,624 ng/L (nanograms per litre) detected in discharge water from the Hillhouse site. For context, the EU drinking water standard is 100 ng/L — making this discharge concentration around 206 times that benchmark. (Note: This is discharge water, not drinking water; the comparison illustrates scale.) EEA-NH4 detected at 1,744 ng/L at the W2 discharge point, and in air up to 20km from site (Hazelrigg sampling station), indicating the chemical was carried through the atmosphere.

Megson et al. Chemosphere Study

Megson, D., Niepsch, D., Spencer, J., Dos Santos, C., Florance, H., MacLeod, C., Ross, I. (2024). Non-targeted analysis reveals hundreds of per- and polyfluoroalkyl substances (PFAS) in UK freshwater in the vicinity of a fluorochemical plant. Chemosphere, 367, 143645. DOI:10.1016/j.chemosphere.2024.143645.

Key findings: Non-targeted analysis (a screening technique that looks for any chemicals present, not just specific ones) found hundreds of suspect PFAS features (697 suspect hits under one screening threshold), with a smaller subset confirmed at higher confidence. Total organofluorine concentration (a broader category of fluorine-containing compounds, including PFAS) approximately 400,000 ng/L. Novel unidentified PFAS compounds (U-PFECAs) detected.

C8 Science Panel Studies

C8 Science Panel. Multiple publications in Environmental Health Perspectives. C8 Science Panel Archive.

Key findings: Six conditions with "probable links" to PFOA exposure identified from 69,030-participant study: kidney cancer, testicular cancer, thyroid disease, ulcerative colitis (a bowel disease), high cholesterol, pre-eclampsia (a serious pregnancy condition involving high blood pressure). (Note: This research relates to PFOA generally, not specifically to Hillhouse.)

Government Reports and Public Health Actions

IARC PFOA Classification

International Agency for Research on Cancer. (2023, November). IARC Monographs Volume 135: PFOA Group 1 Carcinogenic Classification. IARC Press Release.

Key finding: PFOA classified as "Carcinogenic to humans" (Group 1). Based on sufficient evidence in laboratory animals and strong mechanistic evidence in humans.

FSA Egg Advisory and Egg Testing Results

Food Standards Agency / Wyre Council. (2026, February 4). Public advised to avoid eating eggs or egg laying poultry produced near Hillhouse Technology Enterprise Zone. Wyre Council.

Key information: Residents within 1km radius advised not to consume locally produced eggs; PFOS and PFOA levels exceed EFSA safe weekly consumption thresholds. EFSA safe limit: 4.4 µg/kg (sum of PFOA + PFOS + PFHxS + PFNA). Wyre Council-commissioned testing of one duck egg found 83 µg/kg [this figure has been reported in the ENDS Report and BBC News but has not been independently verified against the primary test results — sources: ENDS Report ~Feb 2026; BBC News c70k140e8wlo]; a 60 kg adult eating one such egg would exceed their EFSA Tolerable Weekly Intake. Leigh Day-commissioned testing at four properties within 1km found all four exceeded the EFSA safe limit (Leigh Day, 17 February 2026). Attribution note: The advisory references PFOS — AGC states they have not used or manufactured PFOS [source document to be confirmed]; source of PFOS in local eggs not identified.

UK Government PFAS Plan

Department for Environment, Food and Rural Affairs. (2026, February). PFAS Plan: building a safer future together. GOV.UK Publications.

Key information: UK government national PFAS strategy published February 2026.

Wyre Council / EA Testing Results — Phases 1–3

Wyre Council / Environment Agency. (2024–2026). Hillhouse PFAS Investigation: Phase 1, 2, and 3 Soil Testing Results. Multi-agency investigation reports.

Key findings: Phase 1 (September–October 2024): 187 of 199 soil samples (~94%) showed elevated PFAS levels, across council-owned land up to 5km from the facility. Phase 2: 287 of 291 samples showed elevated levels (98.6%). Peak detection: 144 µg/kg PFOA in residential soil. Phase 3 (February 2026): First residential property tested (WSP code SP510); all 25 samples exceeded Dutch benchmark (3.8 µg/kg); peak 119 µg/kg at 0.60m depth, still rising when sampling stopped. Note on attribution: Soil contamination may reflect contributions from multiple sources over decades. Source attribution has not been published.

Part 2A Contaminated Land Classification — Occupation Road Allotments

Wyre Council / Environment Agency. (2026, March 5). Further Steps Taken in Ongoing Multi-Agency Investigation. Wyre Council Official Statement.

Key information: The EA concluded Occupation Road Allotments meets the statutory criteria for formal classification as Contaminated Land under Part 2A of the Environmental Protection Act 1990. The classification is based on PFOA found in both shallow soil samples and produce grown on the site, with "a significant possibility it could cause significant harm to health." This is the first formal Part 2A classification connected to the Hillhouse investigation. Sandringham Avenue Allotments closed precautionarily pending further results. If a formal Contaminated Land determination is made, Wyre Council has stated it will "identify those responsible and secure remediation." FSA advice updated: residents within 1km should consider raised beds with fresh soil.

Media Investigations

Guardian/Watershed Investigation Series

Laville, S. & Urry, A. (2023, February 24). Toxic substances from chemicals firm site found polluting protected river. The Guardian. Guardian Online.

Key information: Independent water testing detected 12,000 ng/L PFOA (around 120 times the EU drinking water standard) in discharge from the Hillhouse site. First public reporting of contamination data.

BBC Cancer Statistics Analysis

BBC News. (2025, June 30). Thornton families' cancer fears in shadow of 'forever chemical' plant. BBC News. BBC Online.

Key information: Important caveats: This is third-hand data (NHS → Ribble Rivers Trust → BBC). It is not known whether the figures have been age-standardised; Thornton-Cleveleys has an older-than-average demographic, and unadjusted rates in such areas will naturally exceed national averages. No causal link to any specific source has been established. The underlying ward-level dataset has not been independently published. The BBC article reported that NHS data indicated cancer prevalence in two local wards was reported as being above the national average (2021 figures). The precise standardised incidence rates were not published in the article, and the primary data source has not been directly cited in reporting.

Watershed Investigations Water Testing

Watershed Investigations. (2022-2023). Independent PFAS monitoring programme, River Wyre catchment. Via Guardian reporting.

Key information: Independent scientific verification of contamination. 12,000 ng/L PFOA detected in discharge water from the Hillhouse estate.

Legal and Regulatory Classification

Leigh Day Legal Information

Leigh Day LLP. (2024). PFAS pollution near Blackpool: Will it last forever? Leigh Day Blog.

Key information: Environmental law firm investigating potential legal action relating to contamination from the Hillhouse estate.

ECHA EEA-NH4 Classification

European Chemicals Agency. EEA-NH4 (CAS 908020-52-0) Classification and Labelling Database. ECHA Database.

Key information: EEA-NH4 classified as Reproductive Toxicity Category 2 — "suspected of damaging fertility or the unborn child."

European Site Comparison

3M Zwijndrecht Regulatory Action

Flemish Environment Agency. (2021). Administrative safety order for cessation of PFAS activities. Belgian government enforcement action.

Key information: Government-ordered shutdown of PFAS operations. Health screening programme established.

Arkema Pierre-Bénite Cessation

French Regulatory Authority. (2024). Prefectural decree mandating complete PFAS cessation.

Key information: French regulators set deadline and enforced complete PFAS production halt.

Chemours Dordrecht Remediation

Dutch Environmental Authority. Court-ordered soil replacement programme at 1,300 locations.

Key information: Physical removal and replacement of contaminated soil. Biomonitoring programme (blood and urine testing for residents) established.

Key Documents — Quick Reference

  1. Wyre Council — Part 2A Contaminated Land Classification (5 March 2026) — Occupation Road Allotments; first formal classification in the Hillhouse investigation
  2. Wyre Council Phase 2 Soil Testing (sampling September 2024; WSP factual report 2025) — soil contamination results [Note: link goes to general update page; direct link to full WSP report to be confirmed if publicly available]
  3. Environment Agency Permit (via GOV.UK) — AGC Chemicals Europe, Hillhouse
  4. Food Standards Agency Egg Advisory (February 2026)
  5. WHO/IARC PFOA Classification (November 2023) — Group 1 carcinogen
  6. Watershed Investigations Water Analysis (2022-2023)
  7. Megson et al. Chemosphere 2024 — independent PFAS analysis
  8. AGC Environmental Permit (via Environment Agency public register — EPR/BU5453IY)

About This Index

  • Citation format: Citations follow academic formatting for reference purposes
  • Verification: Links checked as of March 2026
  • Updates: This index will be updated as new information becomes available — all changes are recorded on the changelog
  • Public documents: All sources cited are publicly available documents
  • Attribution: Where data comes from a specific operator's regulatory submissions, this is noted. Where contamination has been detected but the source is not identified, this is also noted.

FOI requests: Reference specific document titles and sources when requesting information from the Environment Agency or other authorities.

Further Reading

Films, books, articles, and organisations for understanding PFAS contamination more broadly. Links verified as of March 2026.

Films & Documentaries

Dark Waters (2019)

Feature film telling the story of the legal case against DuPont following PFOA contamination in Parkersburg, West Virginia. Based on actual events that resulted in a settlement (reported as $671 million in personal injury claims, 2017 — source) and the C8 Science Panel study.

The Devil We Know (2018)

Documentary by Stephanie Soechtig examining the DuPont PFOA case and affected communities.

Books

Exposure by Robert Bilott (2019)

"Exposure: Poisoned Water, Corporate Greed, and One Lawyer's Twenty-Year Battle against DuPont" — Memoir by the attorney whose legal work exposed DuPont's PFOA contamination and led to the C8 Science Panel study.

Key Articles & Investigations

Guardian/Watershed Investigations

BBC Coverage

CHEM Trust Coverage (Hillhouse-specific)

Guardian Coverage (additional)

Official Resources

Wyre Council PFAS Pages

Environment Agency Permit Data

Public register entry for AGC Chemicals Europe, Hillhouse (Permit EPR/BU5453IY)

Food Standards Agency PFAS Information

FSA Committee on Toxicity PFAS guidance and risk assessments.

UK Government PFAS Action Plan (February 2026)

UK national PFAS strategy: "Building a Safer Future Together." Published February 2026. CHEM Trust and environmental groups described it as an inadequate response to the scale of the problem.

UK Environmental Audit Committee PFAS Inquiry (2025)

Parliamentary inquiry into PFAS contamination in the UK. Key findings include identification of over 10,000 UK sites as PFAS hotspots. CHEM Trust submitted evidence. Dr David Megson submitted written evidence specifically about Hillhouse (submission reference PFAS0073).

Legal Information

Leigh Day PFAS Information

Environmental law firm investigating potential legal action relating to contamination from the Hillhouse estate.

Italian Miteni Criminal Case (2025)

Court of Vicenza sentenced 11 executives of Miteni (a PFAS-producing plant near Trissino, northern Italy) to a combined 141 years in prison for PFAS pollution that exposed around 350,000 people from 21 towns via contaminated drinking water. The court recognised a causal link between PFAS exposure and employee deaths. Around 200 citizen plaintiffs each received €50,000 compensation. The case is the first successful criminal prosecution of PFAS pollution at this scale in Europe. (Note: This relates to a different site and jurisdiction; presented as international context only.)

France PFAS Ban in Clothing and Cosmetics (February 2026)

France became the first country to ban PFAS in clothing and cosmetics, with the bill passing by a large parliamentary majority in February 2026.

Organisations

CHEM Trust

UK charity working on chemical policy, including PFAS regulation. Has published several articles directly covering the Hillhouse/AGC situation — see Key Articles above. Also submitted evidence to the UK Environmental Audit Committee PFAS inquiry.

International Resources

  • European Environment Agency: PFAS research and policy
  • US EPA PFAS Information: Health and environmental data
  • Stockholm Convention: International treaty restricting PFOA

Notes

  • External links verified as of March 2026
  • For health or legal concerns, consult appropriate professionals