Well Water in Miami County: What to Test and Why

High Risk
Testing Strongly Recommended 54860 samples analyzed
Top Concerns in This County
Iron Radon Chloride

Why This Happens Here

Water in Miami County comes from old limestone and dolomite rock layers deep underground. These rocks have tiny cracks and spaces where water sits and flows slowly. The rock itself is solid and has been there for hundreds of millions of years.

Iron, radon, and chloride show up because they live naturally in this rock. Iron dissolves out of the stone as water moves through it. Radon is a radioactive gas that forms in the rock over time and seeps into the water. Chloride comes from salt that was trapped in the rock long ago and also from road salt that soaks down from the surface.

The water here is extremely hard and full of minerals. You will see white crusty buildup on faucets and in pipes. Iron causes rust-colored stains in sinks and toilets, and the high sodium and sulfate give the water a salty or bitter taste that you will notice when you drink it or use it to cook.

What This Means for You

Chloride, iron, and radon all exceed EPA health standards in Miami County well water. Radon is a radioactive gas that comes from natural rock breakdown. Chloride and iron also show up at levels that need attention. This is a serious situation that demands testing right away.

Long-term exposure to radon increases the risk of lung cancer over time. Iron at these levels causes orange-brown staining in sinks and on laundry. The water here is extremely hard, leaving thick white crusty buildup on faucets and inside pipes. High chloride levels can also affect the taste and feel of your water.

Contact a state-certified lab for a comprehensive mineral and metals panel, which runs $200–400. A basic health screen costs $50–100 but will not catch all three problems. A whole-house treatment system combining a water softener, iron filter, and radon mitigation can address these contaminants.

Contaminant Detection Data

Contaminant Samples % Above MCL Distribution Confidence Risk
Iron 85 60% 29% · 11% · 60% Moderate High
Radon 9 33% 44% · 22% · 33% Low High
Chloride 62 21% 69% · 10% · 21% Moderate High
Arsenic 4 0% 100% · 0% · 0% Low Low
Fluoride 32 0% 100% · 0% · 0% Moderate Low
Sulfate 43 0% 91% · 9% · 0% Moderate Low
Uranium 13 0% 100% · 0% · 0% Low Low
E. coli 1 0% 100% · 0% · 0% Low Safe
Hardness 26 Moderate Low
Lead 1 0% 100% · 0% · 0% Low Safe
Manganese 1 0% 100% · 0% · 0% Low Safe
Nitrate 1 0% 100% · 0% · 0% Low Safe
Nitrate 1 Low Safe
Nitrite 1 0% 100% · 0% · 0% Low Safe
pH 6 Low Low
Sodium 54 Moderate Low
Total Coliform 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.

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