What is PFAS?
PFAS (per- and polyfluoroalkyl substances) are a group of man‑made chemicals used in a wide range of industrial processes and consumer products. They are sometimes known as “forever chemicals”. This includes chemicals that were historically used in fire‑fighting foams, including at airfields and military sites.
How does this relate to Heyford Park?
Investigations by the Environment Agency (EA) and others, have identified the presence of PFAS in local watercourses in the vicinity of Heyford Park. The former RAF Upper Heyford airbase is known to have used fire-fighting foams in the past. However, it has not been confirmed that these substances originated from the site, and there may be other potential sources.
Monitoring has been undertaken at different locations, including by the Environment Agency at points further downstream and by others at locations closer to the site. These have shown varying concentrations, which may reflect factors such as distance from potential sources and dilution within the water environment.
Is there a risk to health?
At present, there is no evidence to suggest an immediate risk to the health of residents.
Who is responsible for investigating water pollution and drinking water safety?
- Controlled waters (such as groundwater, rivers and streams) are regulated by the Environment Agency, which is a statutory consultee on relevant planning applications. More information on their role can be found here
- Drinking water standards are set by the Drinking Water Inspectorate (DWI). Further information is available here
- Drinking water at Upper Heyford is supplied by Thames Water via the mains network, not from private water supplies
Have measures to address contaminated land already been taken when granting planning applications at Heyford Park?
Yes.
Where development has already taken place at Heyford Park, land contamination was assessed and remediated where necessary, in line with the legislation and guidance that applied at the time those developments were approved.
What about new or future development at Heyford Park?
For any new planning applications, the council will:
- Assess each application on its own merits
- Require appropriate land contamination investigations, where relevant
- Ensure that testing, remediation and verification are carried out in line with current national guidance
- Take a precautionary and evidence‑led approach, particularly for sensitive uses such as housing
If additional investigation or mitigation is required because of PFAS or other contaminants, this will be secured through the planning process.
What is the national position on PFAS?
PFAS are recognised as an emerging national issue.
The Government has published a policy paper setting out its approach to managing PFAS and is working towards further national guidance on legacy contamination.
Read further information online
What is the council doing?
Cherwell District Council will continue to:
- Work with expert regulators such as the Environment Agency
- Follow national planning and environmental guidance
- Take a proportionate, precautionary and evidence‑led approach
- Ensure land is safe for its intended use through the planning process