Well Water in Jefferson County: What to Test and Why

High Risk
Testing Strongly Recommended 36638 samples analyzed
Top Concerns in This County
Manganese Iron Radon

Why This Happens Here

Your well water in Jefferson County draws from old sandstone and shale rock layers that sit underground. These rocks have cracks and spaces where water collects and flows. The water has been moving through this rock for years, picking up minerals along the way.

The contaminants you see come from the rock itself and from past coal mining in the region. Manganese and iron dissolve naturally out of the shale and sandstone as acidic water moves through. Radon seeps from tiny amounts of uranium scattered throughout the rock. Sulfate and chloride show up because mining activity and old wells have exposed deeper rock layers to oxygen and water, breaking down minerals that release these contaminants.

Your water is extremely hard and carries high levels of minerals. You will see orange or brown staining on sinks, tubs, and laundry from the iron. The water tastes bitter from sulfate. Scale builds up thick on pipes and in appliances. You need a treatment system to remove these minerals and make the water work better for your home.

What This Means for You

Your well water in Jefferson County has radon, manganese, and iron that exceed EPA health standards. This is a serious situation that needs your attention right away. Radon is a radioactive gas that comes from natural breakdown of uranium in the bedrock. Manganese and iron dissolve into water as it moves through the rock layers beneath your property.

Long-term exposure to radon in water increases your risk of lung cancer and stomach cancer. Manganese can harm your brain and nervous system over time. Iron at the levels found in your area stains sinks, bathtubs, and laundry orange-brown and gives water a metallic taste. Your water is also extremely hard, which builds thick scale inside pipes and on fixtures.

Get your well tested by a state-certified lab right away to confirm which contaminants are in your water. A comprehensive metals and radon panel typically costs two hundred to four hundred dollars. A whole-house treatment system combining aeration, filtration, and softening can address multiple contaminants at once.

Contaminant Detection Data

Contaminant Samples % Above MCL Distribution Confidence Risk
Manganese 29 93% 3% · 7% · 90% Moderate High
Iron 77 71% 20% · 10% · 70% Moderate High
Radon 36 25% 53% · 22% · 25% Moderate High
Sulfate 73 24% 64% · 12% · 23% Moderate High
Chloride 60 5% 93% · 2% · 5% Moderate Moderate
Lead 28 4% 82% · 14% · 4% Moderate Moderate
Fluoride 5 0% 100% · 0% · 0% Low Low
Uranium 4 0% 100% · 0% · 0% Low Low
pH 17 Moderate Low
Nitrate 1 0% 100% · 0% · 0% Low Safe
Nitrite 1 0% 100% · 0% · 0% Low Safe
Arsenic 1 0% 100% · 0% · 0% Low Safe
Sodium 60 Moderate Low
E. coli 1 0% 100% · 0% · 0% Low Safe
Hardness 42 Moderate 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.

Population Health Context

Population-level CDC data. Not individual risk prediction.

9.1%
Heart Disease Rate

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