Well Water in Northampton County: What to Test and Why

High Risk
Testing Strongly Recommended 22258 samples analyzed
Top Concerns in This County
Radon Iron Pfoa

Why This Happens Here

Groundwater in Northampton County contains manganese, radon, iron, and industrial chemicals called PFOA and PFOS that exceed EPA health standards. These contaminant levels are serious enough to require attention from well owners.

The carbonate limestone rock beneath this county naturally releases manganese and iron as groundwater moves slowly through cracks and dissolves minerals over time. Radon forms inside the rock from natural radioactive decay and enters wells through those same fractures. PFOA and PFOS come from industrial sources and persist in groundwater once they enter.

Groundwater in this county is moderately hard, driven mainly by calcium and magnesium from the limestone below, and moderate iron concentrations also contribute to the water's character. The carbonate rock dissolves readily and releases these minerals as water flows through it underground. These mineral characteristics show up commonly across wells tested in this county.

What This Means for You

Wells in Northampton County commonly contain iron, manganese, PFOA, PFOS, and radon at levels that exceed EPA health standards. Radon is a radioactive gas that can increase lung cancer risk with long-term exposure through drinking water and the air it releases into your home. Iron and manganese don't cause immediate health problems but can build up in your body over years. PFOA and PFOS are industrial chemicals that may affect your immune system, thyroid, and cholesterol levels with prolonged exposure.

Wells in this county also show moderate hardness and elevated iron, which creates noticeable quality-of-life issues. Iron stains sinks, toilets, and laundry orange or brown. Hard water leaves white crusty scale buildup on faucets and fixtures. The scale from moderately hard water can shorten the lifespan of water heaters and dishwashers over time. You may also notice a metallic taste in your water.

We recommend testing your well comprehensively because multiple contaminants exceed health standards. Every well is different, and your well may have much higher or lower levels than what is common in the county. Testing is the only way to know what is actually in your water so it can be properly treated. A comprehensive metals and minerals panel typically costs $200-400. Treatment systems like aeration can remove radon, and activated carbon can reduce PFOA and PFOS.

Not sure if your well is affected? Get certified results in 5–7 days.

Test Your Well Water with Tap Score →

Contaminant Detection Data

Contaminant Samples % Above MCL Distribution Confidence Risk
Manganese 3 100% 33% · 0% · 67% Low High
Radon 13 77% 23% · 0% · 77% Low High
Iron 13 33% 62% · 8% · 31% Low High
PFOA ⓘ municipal 241 12% 67% · 21% · 12% High Moderate
PFOS ⓘ municipal 241 5% 75% · 20% · 5% High Moderate
Elevated concentration, not % above limit
HFPO-DA (GenX) ⓘ municipal 225 0% 100% · 0% · 0% High Safe
Chloride 33 0% 100% · 0% · 0% Moderate Low
Sulfate 38 0% 95% · 5% · 0% Moderate Low
Fluoride 3 0% 100% · 0% · 0% Low Low
PFHxS ⓘ municipal 36 0% 100% · 0% · 0% Moderate Safe
PFNA ⓘ municipal 36 0% 100% · 0% · 0% Moderate Safe
Hardness 37 Moderate Low
Fecal Coliform 1 0% 100% · 0% · 0% Low Safe
PFBS ⓘ municipal 224 100% · 0% · 0% High Low
Sodium 51 Moderate Low
Arsenic 1 0% 100% · 0% · 0% Low Safe
pH 19 Moderate Low
Total Coliform 1 0% 100% · 0% · 0% Low Safe
Lead 1 0% 100% · 0% · 0% Low Safe
Nitrate 1 0% 100% · 0% · 0% Low Safe
Nitrite 1 0% 100% · 0% · 0% Low Safe
Uranium 1 0% 100% · 0% · 0% Low Safe
E. coli 1 0% 100% · 0% · 0% Low Safe

MCL = Maximum Contaminant Level (EPA limit for public water; used as benchmark for private wells). Distribution shows % of sampled wells in each concentration band. Methodology.

Data shows potential risk — a certified test confirms whether your water is affected.

Order a Tap Score Test →

Population Health Context

Population-level CDC data. Not individual risk prediction.

7.4%
Cancer Prevalence
(state avg: 7.0%)

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