Well Water in Herkimer County: What to Test and Why

High Risk
Testing Strongly Recommended 95617 samples analyzed
Top Concerns in This County
Lead Radon

Why This Happens Here

Lead, radon, sulfate, and uranium are present in Herkimer County groundwater and well owners need to know about them. These contaminants exceed EPA health standards, which means they require attention.

Limestone rock beneath this county naturally releases radon and uranium as they decay over time. Lead enters groundwater from old plumbing and brass fittings in wells and homes. Sulfate dissolves from the rock and soil as water moves underground.

Groundwater in this county is soft with moderate iron, driven by iron minerals in the limestone bedrock. As water flows through the rock, it picks up these iron compounds. Iron at these levels is common across many wells in the county.

What This Means for You

Wells in Herkimer County commonly exceed EPA health standards for lead, radon, sulfate, and uranium. Lead damages your brain and nervous system, especially in children and pregnant women. Radon is a radioactive gas that increases lung cancer risk when you breathe it in. Uranium builds up in your body over time and can harm your kidneys and bones.

The water in county wells is soft, so you won't have heavy scale buildup or shortened appliance lifespans. Moderate iron levels can leave orange or brown stains on fixtures and clothes. Some people notice a metallic taste in their water. These mineral concerns are mainly about appearance and taste, not health.

Testing is the only way to know what is actually in your well, since every well is different and yours could have higher or lower levels than what is common in the county. We recommend a comprehensive metals and minerals panel to check for all four contaminants. Treatment options like carbon filters, reverse osmosis systems, and radon aeration can address these concerns once you have your results.

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
Lead 5 100% 20% · 0% · 80% Low High
Radon 25 48% 40% · 12% · 48% Moderate High
Sulfate 89 9% 85% · 6% · 9% Moderate Moderate
Uranium 19 5% 95% · 0% · 5% Moderate Moderate
Fluoride 2 0% 100% · 0% · 0% Low Low
Iron 9 0% 89% · 11% · 0% Low Low
Chloride 9 0% 100% · 0% · 0% Low Low
PFHxS ⓘ municipal 16 0% 100% · 0% · 0% Moderate Safe
PFOA ⓘ municipal 16 0% 100% · 0% · 0% Moderate Safe
PFOS ⓘ municipal 16 0% 100% · 0% · 0% Moderate Safe
HFPO-DA (GenX) ⓘ municipal 16 0% 100% · 0% · 0% Moderate Safe
PFNA ⓘ municipal 16 0% 100% · 0% · 0% Moderate Safe
PFBS ⓘ municipal 16 100% · 0% · 0% Moderate Safe
Nitrate 1 0% 100% · 0% · 0% Low Safe
Arsenic 1 0% 100% · 0% · 0% Low Safe
Nitrite 1 0% 100% · 0% · 0% Low Safe
Total Coliform 1 0% 100% · 0% · 0% Low Safe
Fecal Coliform 1 0% 100% · 0% · 0% Low Safe
E. coli 1 0% 100% · 0% · 0% Low Safe
Hardness 41 Moderate Low
pH 14 Low Low
Sodium 101 High Low
Manganese 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.

8.0%
Heart Disease Rate
(state avg: 6.4%)
2.7%
Kidney Disease Rate
(state avg: 2.9%)
6.2%
Cancer Prevalence
(state avg: 6.7%)

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