Well Water in Clarion County: What to Test and Why

High Risk
Testing Strongly Recommended 168204 samples analyzed
Top Concerns in This County
Iron Lead Radon

Why This Happens Here

Your well draws water from fractured Pennsylvanian bedrock—sandstone and shale layers stacked underground. Water fills the tiny cracks running through this rock and flows slowly downward into your well. This type of rock sits beneath your county and neighboring Forest and Venango counties.

Three serious contaminants show up in Clarion County wells at levels that exceed EPA health limits: lead, manganese, and sulfate. Lead enters the water from old plumbing and corrosion in acidic groundwater. Manganese and sulfate dissolve naturally from the dark shale and mineral layers as water moves through the fractured rock. Road salt also adds chloride and sodium to wells near highways and frequently salted roads.

Your water carries extreme levels of dissolved minerals—sodium at 17,000 parts per billion and sulfate at 225,000 parts per billion. This means your water tastes salty, builds heavy scale on pipes and fixtures, and corrodes plumbing over time. You need a whole-house treatment system combining water softening and filtration to make your water usable for daily life and safe to drink.

What This Means for You

Lead exceeds EPA health standards in Clarion County well water. Iron, manganese, sulfate, and chloride also exceed their limits. This is a serious problem that needs your attention right away. Radon in the water adds another health concern on top of these metals and minerals.

Long-term exposure to lead harms brain development in children and can damage nerves and kidneys in adults. Manganese at high levels can hurt your nervous system over time. The extremely high iron and sulfate will stain your sinks, toilets, and laundry orange-brown and leave heavy scale buildup on pipes. The water tastes bitter and salty from the high sodium and sulfate levels.

Get your water tested now by a state-certified lab. A basic health screen costs fifty to one hundred dollars, and a full metals and minerals panel costs two hundred to four hundred dollars. You need a whole-house treatment system that removes lead and manganese, filters iron, and treats radon to protect your family.

Contaminant Detection Data

Contaminant Samples % Above MCL Distribution Confidence Risk
Manganese 2 100% 50% · 0% · 50% Low High
Sulfate 106 49% 43% · 8% · 48% High High
Lead 34 30% 68% · 3% · 29% Moderate High
Radon 12 25% 67% · 8% · 25% Low High
Iron 7 17% 57% · 29% · 14% Low High
Chloride 75 5% 87% · 8% · 5% Moderate Moderate
Uranium 4 0% 100% · 0% · 0% Low Low
Fluoride 3 0% 100% · 0% · 0% Low Low
E. coli 1 0% 100% · 0% · 0% Low Safe
Hardness 24 Moderate Low
pH 26 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
Fecal Coliform 1 Low Safe
Sodium 108 High 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.

6.5%
Heart Disease Rate

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