Groundwater in Calhoun County contains iron, manganese, and chloride as the top contaminants detected. Chloride, iron, manganese, and sulfate all exceed EPA health standards, which is a serious concern that warrants testing and treatment.
These contaminants come from the local rock and soil layers beneath the county. Iron and manganese dissolve naturally from minerals in the rock when groundwater sits in low-oxygen conditions deep underground. Chloride enters from road salt that soaks down through soil into the aquifer. The mixed composition of rock layers here does not filter these minerals out effectively as water passes through.
Groundwater in Calhoun County is very hard, driven primarily by elevated calcium and magnesium that dissolve from the rock. The same low-oxygen conditions that release iron and manganese also allow these hardness minerals to concentrate in the water. Very hard water is the common characteristic across most wells tested in this county.
Wells in Calhoun County commonly contain chloride, iron, manganese, and sulfate at levels above EPA health standards. Chloride at elevated levels can affect people with high blood pressure or heart conditions. Manganese poses a particular concern for young children, as long-term exposure can interfere with brain development and learning. Iron and sulfate themselves are not directly regulated for health, but they indicate your water comes from certain geological conditions.
The mineral content in county wells creates noticeable everyday impacts. Iron causes orange or rust-colored staining on sinks, toilets, and laundry. Sulfate at these concentrations gives water a bitter or unpleasant taste. These minerals also build up as hard scale inside pipes and on water heaters, and extremely hard water can shorten the lifespan of appliances like dishwashers and water heaters.
We recommend testing your well because every well is different--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 in this area, a comprehensive metals and minerals panel is recommended and typically costs $200-400. Treatment options like oxidation filters combined with water softening systems can 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 | |
| Chloride | 21 | 5% | Moderate |
Moderate
Elevated concentration, not % above limit
|
|
| Sulfate | 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 ⓘ | |
| 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 ⓘ | |
| Nitrate | 5 | 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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