Well Water in Hancock County: What to Test and Why

High Risk
Testing Strongly Recommended 13238 samples analyzed
Top Concerns in This County
Iron Manganese Sulfate

Why This Happens Here

Groundwater in Hancock County contains iron, manganese, sulfate, chloride, nitrite, and radon. Several of these contaminants exceed EPA health standards, which is a serious concern that requires testing and treatment.

These contaminants come from the bedrock itself. Iron and manganese dissolve naturally as groundwater moves through cracks and fractures in the deep rock layers. Sulfate and chloride also come from minerals locked in the stone, while road salt contributes additional chloride to the water in some areas.

Groundwater in this county is very hard, with calcium and magnesium from the limestone and dolomite bedrock creating levels that are well above normal. Iron at high concentrations adds to the mineral burden in the water. These characteristics are widespread across wells throughout Hancock County.

What This Means for You

Wells in Hancock County contain several metals and minerals that exceed EPA health standards. Chloride, nitrite, and radon in the groundwater raise health concerns over time. Manganese can harm brain development and nervous system function. Iron and sulfate at elevated levels can damage your kidneys and digestive system. These contaminants have no taste, smell, or color, so testing is the only way to know if they are in your well.

The mineral content in county wells creates significant quality-of-life problems. Water is extremely hard here, leaving thick white crusty buildup on fixtures and inside pipes. Iron causes orange or rust-colored stains on sinks, toilets, and laundry. Sulfate can give water a bitter or rotten-egg taste and smell. This extreme hardness shortens the lifespan of water heaters, dishwashers, and other appliances.

We recommend testing your well with a comprehensive metals and minerals panel, which typically costs $200-400. Every well is different, and your well may have 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 water softener combined with an iron filter can address both the hardness and metal concerns.

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
Iron 85 64% 25% · 12% · 64% Moderate High
Manganese 19 56% 26% · 21% · 53% Moderate High
Sulfate 48 29% 50% · 21% · 29% Moderate High
Radon 4 25% 50% · 25% · 25% Low High
Chloride 87 7% 82% · 12% · 7% Moderate Moderate
Nitrite 46 4% 89% · 6% · 4% Moderate Moderate
Elevated concentration, not % above limit
HFPO-DA (GenX) ⓘ municipal 4 0% 100% · 0% · 0% Low Safe
PFHxS ⓘ municipal 4 0% 100% · 0% · 0% Low Safe
PFOS ⓘ municipal 4 0% 100% · 0% · 0% Low Safe
PFOA ⓘ municipal 4 0% 100% · 0% · 0% Low Safe
PFNA ⓘ municipal 4 0% 100% · 0% · 0% Low Safe
Fluoride 25 0% 76% · 24% · 0% Moderate Low
Nitrate 3 0% 100% · 0% · 0% Low Low
E. coli 1 0% 100% · 0% · 0% Low Safe
PFBS ⓘ municipal 4 100% · 0% · 0% Low Safe
Sodium 52 Moderate Low
Hardness 37 Moderate Low
Lead 1 0% 100% · 0% · 0% Low Safe
pH 6 Low Low
Arsenic 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.

7.3%
Cancer Prevalence
(state avg: 6.8%)

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