PFAS Pennsylvania Well Water: Testing Guide

PFAS Pennsylvania contamination is a bigger problem than most residents realize. The state has identified over 125 contaminated water systems and adopted its own maximum contaminant levels before the federal EPA acted. New PFAS Pennsylvania contamination zones continue to surface as testing expands statewide.

If you're on a private well anywhere in PA — but especially within 5 miles of a military base, airport, or industrial facility — testing for PFAS isn't optional. It's a basic safety measure. Here's where the risks are concentrated, what testing involves, and which treatment options actually remove these chemicals.

Where PFAS Pennsylvania Contamination Is Worst

PFAS contamination in PA centers around sites where PFAS-containing firefighting foam (called AFFF) was used for decades. Military bases are the primary sources, but airports, fire training academies, and some industrial operations also contributed.

Warminster and Warrington (Bucks County)

The most heavily affected area in Pennsylvania. The former Naval Air Warfare Center in Warminster and the former Naval Air Station Joint Reserve Base in Warrington used AFFF extensively. PFAS migrated into the groundwater that feeds private wells and public water supplies across a wide area of Bucks County.

Testing in these communities has found PFOS and PFOA levels far exceeding the EPA's current limit of 4 parts per trillion (ppt). Many affected residents have been connected to public water or provided bottled water, but private well owners on the edges of the contamination plume may not know they're affected.

Horsham and Surrounding Areas

The Horsham Air Guard Station (also in Bucks and Montgomery counties) is another major PFAS source. Contamination has spread through the underlying aquifer, affecting wells in Horsham Township and neighboring communities.

Other PA Contamination Sites

Beyond the Bucks County cluster, PFAS Pennsylvania detections have been found near military installations and industrial sites across the state. Notable areas include locations near airports with historical AFFF use, former manufacturing sites that used PFAS in production processes, and areas near older landfills that received PFAS-containing waste.

PFAS Well Water Testing: How and Where

Testing your well for PFAS requires a certified laboratory. Home test kits cannot accurately measure PFAS at the parts-per-trillion levels that matter for health decisions.

The process is straightforward. Order a PFAS test kit from a PA DEP-certified laboratory. The lab sends you sample bottles with specific collection instructions. You collect the water sample following their protocol exactly — contamination from everyday products can skew results. Ship the sample back to the lab. Results arrive in 2 to 4 weeks.

PFAS well water testing typically costs $200 to $400 for a comprehensive panel covering PFOA, PFOS, and other PFAS compounds. Some labs offer screening tests for $150 that cover fewer compounds but catch the most common ones.

Test Type	Cost	Compounds Covered	Turnaround
PFAS screening (6–8 compounds)	$150–$250	PFOA, PFOS, GenX, and key others	2–3 weeks
Comprehensive PFAS panel (20–30+)	$300–$400	Full suite including short-chain	3–4 weeks
EPA Method 533 (full)	$350–$500	25 compounds per EPA method	3–4 weeks

Understanding Your PFAS Test Results

The EPA set maximum contaminant levels (MCLs) of 4 ppt for PFOA and PFOS individually. Pennsylvania adopted even stricter standards for some compounds before the federal rule took effect.

If your results come back below 4 ppt for PFOA and PFOS, your water meets current federal standards. If any compound exceeds the MCL, treatment is recommended. If levels are significantly elevated (above 70 ppt — the previous EPA health advisory level), take immediate action by switching to bottled water for drinking and cooking until treatment is installed.

PFAS Water Filter Options That Work

Not all water filters remove PFAS. Standard carbon pitcher filters (like Brita) reduce some PFAS but don't reliably bring levels below the MCL. Here's what actually works.

Reverse osmosis (RO) removes approximately 95% of PFAS compounds. Point-of-use systems installed under the kitchen sink cost $200 to $500. Whole-house RO systems run $1,500 to $4,000 but treat all water entering the home.

Granular activated carbon (GAC) filters are effective for longer-chain PFAS like PFOA and PFOS. Whole-house GAC systems cost $1,000 to $3,000 with annual filter replacement around $200 to $400. They're less effective against shorter-chain PFAS compounds.

Ion exchange filters target PFAS specifically. These newer systems cost $2,000 to $5,000 but may provide the most complete removal across all PFAS compound types.

For treatment system installation and maintenance, browse water treatment providers in our PA directory.

Additional PFAS Contamination Sites in Pennsylvania

Beyond the well-known Bucks County cluster, PFAS Pennsylvania contamination has been documented at dozens of sites across the state. These lesser-known locations still affect private well owners who may not realize they are in a contamination zone.

Willow Grove and Surrounding Areas (Montgomery County)

The former Naval Air Station Joint Reserve Base Willow Grove and the adjacent Horsham Air Guard Station have created a combined contamination plume affecting wells in Warminster, Warrington, and Horsham townships. Montgomery County wells near these facilities have tested at levels 10 to 100 times above the EPA's 4 ppt MCL for PFOA and PFOS.

Northeast Pennsylvania — Tobyhanna Army Depot

The Tobyhanna Army Depot in Monroe County used AFFF for decades. Groundwater testing has found PFAS contamination in the surrounding area. Private well owners in the Pocono Mountains near the depot should test for PFAS, especially those within a 3-mile radius of the installation.

Harrisburg Area — Capital Region Airport

Airports with historical AFFF use are emerging PFAS sources. The Capital Region International Airport (formerly Harrisburg International) and several smaller regional airports across PA have documented PFAS in groundwater near their fire training areas. Dauphin and Cumberland county well owners near airports should consider testing.

Industrial Sites Across PA

PFAS contamination is not limited to military and airport sites. Manufacturing facilities that used PFAS in production processes — including textile mills, chrome plating operations, and paper manufacturing — have contaminated groundwater in localized areas across the state. The PA DEP maintains an updated list of known contamination sites on their website.

County-Level PFAS Risk Assessment

Not every PA county has the same PFAS risk. This assessment helps private well owners prioritize testing based on their county's known contamination sources and geology.

Risk Level	Counties	Primary Sources	Testing Priority
Very High	Bucks, Montgomery	Military bases, industrial sites	Test immediately
High	Chester, Delaware, Monroe	Military depots, airports	Test within 6 months
Moderate	Dauphin, Cumberland, Berks, Lehigh	Airports, industrial facilities	Test within 12 months
Lower (not zero)	Most rural PA counties	Landfills, scattered industrial	Test if within 5 mi of known source

Even in lower-risk counties, well owners near older landfills should consider testing. Landfills that accepted industrial waste before PFAS regulations may have PFAS in their leachate, which can migrate to surrounding groundwater. Pennsylvania has over 1,100 active and closed landfills, and PFAS screening of these sites is ongoing.

PA DEP-Certified PFAS Testing Labs

Private well owners need a certified lab for accurate PFAS testing. The following laboratory types serve Pennsylvania homeowners.

Penn State Extension. Offers water testing services through their agricultural analytical lab. While their standard well water panel does not include PFAS, they can direct homeowners to partner labs that do. Penn State Extension also provides interpretation guidance for test results.

Commercial environmental labs. Several PA-based and national laboratories hold PA DEP certification for PFAS analysis using EPA Method 533 or Method 537.1. These labs provide sample collection kits with detailed instructions. Turnaround time is typically 2 to 4 weeks. Costs range from $150 for a screening panel to $500 for comprehensive PFAS analysis.

County health departments. Some PA county health departments offer subsidized PFAS testing for residents in known contamination zones. Bucks County and Montgomery County have been the most proactive, offering free or reduced-cost testing for well owners near military installations. Contact your county health department to inquire about available programs.

When selecting a lab, verify they hold current PA DEP certification for PFAS analysis and use EPA-approved methods. Results from uncertified labs may not be accepted by regulators if you need to pursue remediation assistance. Browse well water testing providers through our Pennsylvania directory.

Frequently Asked Questions About PFAS in PA

Should I test for PFAS if I don't live near a military base?

Military bases are the largest sources, but not the only ones. Airports, fire training facilities, landfills, and some manufacturing plants also used PFAS-containing materials. If your well is within 5 miles of any of these, testing is a reasonable precaution. PA has identified 125+ contaminated water systems statewide.

Does boiling water remove PFAS?

No. Boiling water does not remove PFAS. In fact, boiling concentrates PFAS by evaporating water while the chemicals remain behind. Only filtration systems designed specifically for PFAS removal (reverse osmosis, GAC, or ion exchange) are effective.

Who pays for PFAS testing and treatment in PA?

Private well owners are responsible for their own testing and treatment costs. However, if contamination traces back to a military installation, the Department of Defense may provide bottled water, connect you to public water, or fund treatment systems. Contact your municipality to learn about available assistance programs.

Are PFAS health effects proven?

Extensive research links PFAS exposure to increased cancer risk (particularly kidney and testicular cancer), thyroid disease, immune system suppression, developmental issues in children, and reproductive problems. The EPA's 4 ppt MCL for PFOA and PFOS reflects the scientific consensus on health risks at low concentrations.

How do I dispose of PFAS-contaminated filter cartridges?

GAC filters that have absorbed PFAS should be handled as hazardous waste. Contact your county waste authority for disposal guidance. Most PA counties accept them at household hazardous waste collection events held several times per year. Never place spent PFAS filters in regular trash.