Groundwater in Calhoun County contains manganese, iron, sulfate, and chloride. Several of these contaminants exceed EPA health standards, indicating levels that deserve attention.
These metals and minerals dissolve naturally from the mixed rock layers beneath the county. As groundwater moves slowly through these rocks in low-oxygen conditions, iron and manganese release into the water. Chloride enters partly from road salt that soaks down through soil from highways and roads.
Groundwater in this county is moderately hard, driven by elevated iron and manganese from the underlying rocks. These mineral characteristics show up across many wells in the county, though individual wells vary depending on depth and location.
Wells in Calhoun County commonly contain chloride, iron, manganese, and sulfate at levels that exceed EPA health standards. Chloride at elevated levels is a concern for people with high blood pressure or heart disease, as it increases sodium intake in the body. Manganese can harm brain development in children and affect nerve function in adults with long-term exposure. Iron and sulfate themselves do not pose direct health risks at the levels found here, but they indicate the mineral character of the water.
The mineral content in county wells creates noticeable quality-of-life problems. Iron causes orange or rust-colored staining on sinks, toilets, and laundry. Sulfate can give water a bitter or unpleasant taste. These minerals also build up as scale inside pipes and appliances, which can reduce water flow and shorten the lifespan of water heaters and dishwashers over time.
We recommend testing your well because every well is different, and your water may have higher or lower levels than what is common in the county. Testing is the only way to know what is actually in your well so it can be properly treated. Since multiple analytes exceed standards here, a comprehensive metals and minerals panel is recommended and typically costs $200-400. Treatment options like oxidation filters or water softeners can help address these concerns.
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 | 19 | 58% | Moderate | High | |
| Manganese | 19 | 37% | Moderate | High | |
| Sulfate | 21 | 5% | Moderate |
Moderate
Elevated concentration, not % above limit
|
|
| Chloride | 21 | 5% | Moderate |
Moderate
Elevated concentration, not % above limit
|
|
| Arsenic | 18 | 0% | Moderate | Low | |
| Fluoride | 19 | 0% | Moderate | Low | |
| HFPO-DA (GenX) ⓘ municipal | 12 | 0% | Low | Safe | |
| Lead | 8 | 0% | Low | Low ⓘ | |
| Nitrate | 5 | 0% | Low | Low ⓘ | |
| Nitrite | 5 | 0% | Low | Safe ⓘ | |
| PFHxS ⓘ municipal | 12 | 0% | Low | Safe | |
| PFNA ⓘ municipal | 12 | 0% | Low | Safe | |
| PFOA ⓘ municipal | 12 | 0% | Low | Safe | |
| PFOS ⓘ municipal | 12 | 0% | Low | Safe | |
| Uranium | 2 | 0% | Low | Low ⓘ | |
| Sodium | 21 | — | Moderate | Low | |
| pH | 31 | — | Moderate | Low | |
| PFBS ⓘ municipal | 12 | — | Low | Safe | |
| Hardness | 19 | — | 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.
* 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.
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