Well Water in Erie County: What to Test and Why

High Risk
Testing Strongly Recommended 29526 samples analyzed
Top Concerns in This County
Iron Radon Chloride

Why This Happens Here

Lead, manganese, iron, chloride, radon, and sulfate are present in Erie County groundwater at levels exceeding EPA health standards. These contaminant levels are concerning enough that well owners need to know about them and take action.

The rock beneath this county naturally contains minerals that dissolve into water as it moves through cracks and fractures underground. Lead can also seep in from old pipes and plumbing materials in homes. Radon comes from radioactive uranium that breaks down in the bedrock over time. Road salt and other sources add chloride to groundwater in populated areas.

Groundwater in this county is very hard, driven by elevated calcium and magnesium from the bedrock. Hard water forms when water stays in contact with rock for long periods, dissolving these minerals. Iron concentrations are also high and add to the mineral content. These characteristics are widespread across wells throughout the county.

What This Means for You

Wells in Erie County commonly exceed EPA health standards for chloride, iron, lead, manganese, radon, and sulfate. Lead damages children's developing brains and causes learning problems. Radon is a radioactive gas that increases lung cancer risk. Manganese can harm brain development in children. Chloride and sulfate at high levels can affect kidney function and digestion. Iron and lead both pose serious health concerns when present above safe thresholds.

The water in this county is very hard, which creates noticeable problems around your home. You will see orange or brown staining on fixtures, laundry, and surfaces from iron buildup. Hard water leaves white scale inside pipes and on appliances, which can shorten the lifespan of water heaters and dishwashers. Scale buildup reduces water flow and makes cleaning less effective. Some people notice a metallic or bitter taste.

Your well is unique, and your water may contain much higher or lower levels than what is common here. Testing is the only way to know what is actually in your well so you can treat it properly. We recommend a comprehensive metals and minerals panel, which typically costs between two hundred and four hundred dollars. Depending on results, treatment options like water softeners, iron filters, or radon removal systems can address specific problems in your water.

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 2 100% 50% · 0% · 50% Low High
Lead 2 100% 50% · 0% · 50% Low High
Iron 59 57% 27% · 17% · 56% Moderate High
Chloride 112 37% 55% · 8% · 37% High High
Sulfate 48 19% 73% · 8% · 19% Moderate High
Radon 22 18% 50% · 32% · 18% Moderate High
Uranium 16 0% 100% · 0% · 0% Moderate Low
Fluoride 2 0% 100% · 0% · 0% Low Low
Arsenic 4 0% 75% · 25% · 0% Low Low
PFOA ⓘ municipal 41 0% 95% · 5% · 0% Moderate Low
HFPO-DA (GenX) ⓘ municipal 38 0% 100% · 0% · 0% Moderate Safe
PFHxS ⓘ municipal 38 0% 100% · 0% · 0% Moderate Safe
PFNA ⓘ municipal 38 0% 100% · 0% · 0% Moderate Safe
PFOS ⓘ municipal 38 0% 100% · 0% · 0% Moderate Safe
PFBS ⓘ municipal 38 100% · 0% · 0% Moderate Safe
Hardness 33 Moderate Low
E. coli 1 0% 100% · 0% · 0% Low Safe
Fecal Coliform 1 0% 100% · 0% · 0% Low Safe
Total Coliform 1 0% 100% · 0% · 0% Low Safe
Nitrite 1 0% 100% · 0% · 0% Low Safe
Nitrate 1 0% 100% · 0% · 0% Low Safe
Sodium 83 Moderate Low
pH 14 Low Low

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.

5.4%
Heart Disease Rate
(state avg: 6.4%)
5.9%
Cancer Prevalence
(state avg: 6.7%)

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