Iron, arsenic, and sulfate are present in Clinton County's groundwater, and all three exceed EPA health standards. These levels are concerning and require attention.
The rock beneath Clinton County naturally contains iron and arsenic locked in its minerals. As groundwater moves slowly through cracks in the rock, these elements dissolve into the water over time. Sulfate also comes from minerals in the bedrock that release into water through this same slow contact process.
Groundwater in Clinton County is very hard, driven by elevated calcium and magnesium from the limestone and mineral-rich rock below. Iron dissolves naturally from the bedrock and gives water an orange or brown tint, while sulfate adds a bitter character. These mineral characteristics are common across wells throughout the county.
Wells in Clinton County commonly contain arsenic, chloride, iron, and sulfate at levels exceeding EPA health standards. Arsenic is the most serious concern--it builds up in your body over time and increases your risk of cancer, heart disease, and other illnesses. You cannot taste, smell, or see arsenic in water. Iron and chloride can also affect your health at high levels. Sulfate exposure over time may cause digestive problems.
The high iron in county wells causes orange or reddish staining on sinks, toilets, and laundry. Sulfate gives water a bitter or unpleasant taste. The water in this county is very hard, which means white crusty buildup forms on pipes, fixtures, and appliances. Hard water this severe can shorten the lifespan of water heaters and dishwashers. You may also notice the water feels slippery or leaves a film on skin.
We recommend testing your well right away, since arsenic is present in this county. Every well is different--your well may have higher or lower levels than what is common here. Testing is the only way to know what is actually in your water so you can treat it properly. A comprehensive metals and minerals panel typically costs $200-400. Treatment options like reverse osmosis systems or specialized arsenic removal filters can address these contaminants.
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 | 158 | 84% | High | High | |
| Manganese | 37 | 14% | Moderate | Moderate | |
| Arsenic | 16 | 12% | Moderate | Moderate | |
| Sulfate | 173 | 5% | High | Moderate | |
| Chloride | 175 | 4% | High |
Moderate
Elevated concentration, not % above limit
|
|
| Fluoride | 43 | 0% | Moderate | Low | |
| HFPO-DA (GenX) ⓘ municipal | 3 | 0% | Low | Safe ⓘ | |
| Lead | 2 | 0% | Low | Safe ⓘ | |
| Nitrate | 59 | 0% | Moderate | Low | |
| Nitrite | 2 | 0% | Low | Low ⓘ | |
| PFHxS ⓘ municipal | 3 | 0% | Low | Safe ⓘ | |
| PFNA ⓘ municipal | 3 | 0% | Low | Safe ⓘ | |
| PFOA ⓘ municipal | 3 | 0% | Low | Safe ⓘ | |
| PFOS ⓘ municipal | 3 | 0% | Low | Safe ⓘ | |
| Uranium | 2 | 0% | Low | Low ⓘ | |
| Sodium | 137 | — | High | Low | |
| pH | 153 | — | High | Low | |
| PFBS ⓘ municipal | 3 | — | Low | Safe ⓘ | |
| Hardness | 175 | — | 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.
* 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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