Pennsylvania
Warminster
PFAS detected in your water, but all levels are below 50% of federal limits.
- Population served
- 40K
- Systems tested
- 1
- Compounds detected
- 29
- Above federal limits
- 0
Source: EPA UCMR 5 · Samples collected 2023–2026
What was found in Warminster’s water
WARMINSTER MUNICIPAL AUTHORITY
Serves 40K people · SWP
This compound is monitored under UCMR 5 but has no enforceable EPA drinking water limit yet.
This compound is monitored under UCMR 5 but has no enforceable EPA drinking water limit yet.
This compound is monitored under UCMR 5 but has no enforceable EPA drinking water limit yet.
This compound is monitored under UCMR 5 but has no enforceable EPA drinking water limit yet.
This compound is monitored under UCMR 5 but has no enforceable EPA drinking water limit yet.
This compound is monitored under UCMR 5 but has no enforceable EPA drinking water limit yet.
This compound is monitored under UCMR 5 but has no enforceable EPA drinking water limit yet.
This compound is monitored under UCMR 5 but has no enforceable EPA drinking water limit yet.
This compound is monitored under UCMR 5 but has no enforceable EPA drinking water limit yet.
This compound is monitored under UCMR 5 but has no enforceable EPA drinking water limit yet.
This compound is monitored under UCMR 5 but has no enforceable EPA drinking water limit yet.
This compound is monitored under UCMR 5 but has no enforceable EPA drinking water limit yet.
This compound is monitored under UCMR 5 but has no enforceable EPA drinking water limit yet.
This compound is monitored under UCMR 5 but has no enforceable EPA drinking water limit yet.
This compound is monitored under UCMR 5 but has no enforceable EPA drinking water limit yet.
This compound is monitored under UCMR 5 but has no enforceable EPA drinking water limit yet.
This compound is monitored under UCMR 5 but has no enforceable EPA drinking water limit yet.
This compound is monitored under UCMR 5 but has no enforceable EPA drinking water limit yet.
This compound is monitored under UCMR 5 but has no enforceable EPA drinking water limit yet.
This compound is monitored under UCMR 5 but has no enforceable EPA drinking water limit yet.
This compound is monitored under UCMR 5 but has no enforceable EPA drinking water limit yet.
This compound is monitored under UCMR 5 but has no enforceable EPA drinking water limit yet.
This compound is monitored under UCMR 5 but has no enforceable EPA drinking water limit yet.
This compound is monitored under UCMR 5 but has no enforceable EPA drinking water limit yet.
About PFAS contamination in Warminster
## Summary Warminster's municipal water system received a B grade, indicating generally acceptable water quality with some areas of concern that residents should be aware of. One compound, PFBA, was detected at 12 parts per trillion in the Warminster Municipal Authority system; while no federal limit currently exists for PFBA, its presence is worth noting. The majority of the 15 PFAS compounds tested — including PFOS and PFOA, which carry EPA limits of 4 parts per trillion each — were detected but specific concentrations were not reported in the available data. The contamination source has been identified as the Naval Air Warfare Center and Willow Grove Air Force Base, where firefighting foam containing PFAS chemicals was historically used.
## What the data shows Of the 15 PFAS compounds tested in the Warminster Municipal Authority system, only PFBA returned a reported concentration of 12 parts per trillion. The remaining 14 compounds, including regulated chemicals like PFOS, PFOA, PFHxS, PFNA, and HFPO-DA, were detected but their specific concentrations were not disclosed in the available data. Because those concentrations are unreported, it is not possible to determine from this dataset whether any regulated compounds exceed their respective EPA limits.
## What residents should know Warminster residents should contact the Warminster Municipal Authority directly to request the most current water quality report and ask specifically about concentrations for all detected PFAS compounds. The contamination has been linked to military firefighting foam use, and residents may be eligible for compensation through settlements with 3M and DuPont; Navy remediation efforts are also ongoing. Visit the authority's website or call them directly for the latest testing results.
About this summary: Narrative text on this page was drafted by an AI model (claude-sonnet-4-6) from EPA UCMR 5 data and reviewed before publication. The numeric data above is reported by water utilities directly to the EPA. If you spot an error, email data@checkyourwater.org.
What Warminster residents can do
PFAS were detected in Warminster's water but levels are well below federal limits. Steps to maintain awareness:
- Read your utility's annual Consumer Confidence Report (CCR) — request a copy if you don't receive one.
- Sign up for water quality alerts from your utility.
- If you're on a private well, get it independently tested for PFAS.
- Reduce PFAS exposure from non-water sources: avoid non-stick cookware, stain-resistant fabrics, and grease-resistant food packaging.
Primary contamination source: Naval Air Warfare Center / Willow Grove AFFF
Settlement information: Navy remediation; 3M/DuPont settlement eligible
How Warminster compares
Warminster is one of 1 community we track in Pennsylvania where PFAS levels exceed federal limits.
Where this data comes from
- Testing program: EPA Unregulated Contaminant Monitoring Rule, 5th cycle (UCMR 5)
- Testing period: 2023–2026
- Federal limits: EPA Maximum Contaminant Levels (MCLs) finalized April 2024
- Methodology: Read how we calculate grades
- Raw EPA data: EPA UCMR Occurrence Data
This data reflects EPA testing. Your water utility may have more recent results — contact them directly for the most current information.