Well Water in Sullivan County: What to Test and Why

High Risk
Testing Strongly Recommended 8412 samples analyzed
Top Concerns in This County
Radon Manganese Iron

Why This Happens Here

Groundwater in Sullivan County contains radon, manganese, and iron, with several contaminants exceeding EPA health standards. These levels for chloride, iron, lead, manganese, and radon are concerning enough to require testing and likely treatment.

The rock beneath Sullivan County naturally holds these metals. As groundwater moves slowly through cracks in the Pennsylvanian rock, it dissolves iron and manganese. Radon, a radioactive gas, comes from natural radioactive elements trapped in the rock layers. Chloride and lead enter from surface sources like road salt and old pipes.

Groundwater in this county is soft with moderate iron content. The Pennsylvanian rock releases iron directly into the water as it passes through. Iron levels are common across wells in this county. Most wells here show this characteristic, making testing important for every owner.

What This Means for You

Wells in Sullivan County commonly contain chloride, iron, lead, manganese, and radon at levels above EPA health standards. Lead harms brain development in children and can damage the nervous system in adults. Radon is a radioactive gas that increases lung cancer risk over time. Manganese can affect brain development and cause neurological problems, especially in children. Chloride at high levels is a health concern for people on sodium-restricted diets and those with certain medical conditions. Iron itself is not a direct health threat at these levels, but it indicates the water chemistry that allows other contaminants to dissolve.

Wells in this county show moderate iron levels that will stain sinks, toilets, and laundry. You may notice a metallic or earthy taste in your water. The water here is relatively soft, so you won't see heavy scale buildup on pipes and fixtures like you would in harder water areas.

We recommend testing your well water because every well is different, and your water may have higher or lower levels than what is common in the county. Since multiple contaminants exceed health standards, a comprehensive metals and minerals panel is recommended to get a complete picture--these typically cost $200-400. Testing is the only way to know what is actually in your well so you can treat it properly. Treatment options like aeration systems and activated carbon filters can address several of these contaminants.

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
Radon 21 71% 5% · 24% · 71% Moderate High
Manganese 11 70% 18% · 18% · 64% Low High
Iron 4 33% 75% · 0% · 25% Low High
Chloride 64 5% 95% · 0% · 5% Moderate Moderate
Elevated concentration, not % above limit
Lead 32 3% 97% · 0% · 3% Moderate Moderate
Elevated concentration, not % above limit
Sulfate 16 0% 100% · 0% · 0% Moderate Low
Nitrite 4 0% 100% · 0% · 0% Low Low
Uranium 25 0% 92% · 8% · 0% Moderate Low
PFOA 8 0% 100% · 0% · 0% Low Safe
PFOS 8 0% 100% · 0% · 0% Low Safe
Fluoride 1 0% 100% · 0% · 0% Low Safe
Nitrate 1 0% 100% · 0% · 0% Low Safe
Arsenic 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
Sodium 60 Moderate Low
pH 12 Low Low
Hardness 23 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.

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.

10.0%
Heart Disease Rate
(state avg: 7.2%)
6.1%
Cancer Prevalence
(state avg: 7.0%)

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