Groundwater in Clinton County contains radon, iron, and PFOA compounds that well owners need to monitor. Iron and PFOA exceed EPA health standards, making testing and treatment important steps for your household.
The limestone rock beneath Clinton County naturally releases radon as radioactive minerals in the stone decay over time. Iron enters the groundwater as water moves through the limestone and surrounding rock layers. PFOA and similar compounds come from industrial and commercial sources in the region, including past manufacturing sites and areas where firefighting foam was used.
Groundwater in this county is moderately hard, driven by calcium and magnesium from the limestone bedrock below. As water filters down through limestone, it dissolves these minerals and carries them into your well. Moderate iron levels show up across many wells in the county, while radon and PFOA contamination is more location-specific, so your individual results will depend on where your well draws water from underground.
Wells in Clinton County contain iron, PFOA, PFOS, and radon at levels that exceed EPA health standards. Radon is a radioactive gas that increases lung cancer risk with long-term exposure. PFOA and PFOS are human-made chemicals linked to serious health problems including kidney disease, thyroid problems, and developmental issues. Iron at elevated levels can cause stomach problems and damage to organs over time.
County wells show moderate iron levels that create staining on fixtures, laundry, and dishes. Water may have a metallic or unpleasant taste. The water is moderately hard, which means mineral buildup on appliances like dishwashers and water heaters can shorten their lifespan and reduce how well they work.
Your well is unique and could have higher or lower contaminant levels than what is common in the county. Testing is the only way to know what is actually in your water so you can treat it properly. We recommend a comprehensive testing panel that checks for metals, minerals, bacteria, nitrate, PFOA, PFOS, and radon, which typically costs $200 to $400. Treatment options like activated carbon filters, reverse osmosis systems, or radon mitigation can address these concerns based on your specific results.
Not sure if your well is affected? Get certified results in 5–7 days.
Test Your Well Water with Tap Score →| Contaminant | Samples ⓘ | % Above MCL ⓘ | Distribution ⓘ | Confidence ⓘ | Risk ⓘ |
|---|---|---|---|---|---|
| Iron | 81 | 47% | Moderate | High | |
| Radon | 23 | 43% | Moderate | High ⓘ | |
| Manganese | 81 | 36% | Moderate | High | |
| Arsenic | 33 | 9% | Moderate | Moderate | |
| Chloride | 83 | 0% | Moderate | Low | |
| Fluoride | 84 | 0% | Moderate | Low | |
| HFPO-DA (GenX) ⓘ municipal | 8 | 0% | Low | Safe ⓘ | |
| Lead | 33 | 0% | Moderate | Low | |
| Nitrate | 84 | 0% | Moderate | Low | |
| Nitrite | 26 | 0% | Moderate | Low | |
| PFHxS ⓘ municipal | 8 | 0% | Low | Safe ⓘ | |
| PFNA ⓘ municipal | 8 | 0% | Low | Safe ⓘ | |
| PFOA ⓘ municipal | 8 | 0% | Low | Safe ⓘ | |
| PFOS ⓘ municipal | 8 | 0% | Low | Safe ⓘ | |
| Sulfate | 83 | 0% | Moderate | Low | |
| Uranium | 23 | 0% | Moderate | Low | |
| Total Coliform | 5* | 0% | Low | Low ⓘ | |
| Sodium | 54 | — | Moderate | Low | |
| pH | 84 | — | Moderate | Low | |
| PFBS ⓘ municipal | 8 | — | Low | Safe ⓘ | |
| Hardness | 84 | — | Moderate | Low | |
| Fecal Coliform | 5* | 0% | Low | Safe ⓘ | |
| E. coli | 5* | 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.
* Microbial contaminants (E. coli, coliform) reflect only samples from the last 10 years.
Data shows potential risk — a certified test confirms whether your water is affected.
Order a Tap Score Test →Population-level CDC data. Not individual risk prediction.
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