Well owners in Marion County should be aware of iron, chloride, manganese, and nitrate in their groundwater. Several of these contaminants exceed EPA health standards, so testing your well is important.
These contaminants come from natural sources in the rock layers below. The Mississippi embayment aquifer system contains minerals that dissolve into groundwater over time, and chloride and nitrate can also seep in from surface activities like agriculture and road salt use in the area.
Groundwater in this county is soft with moderate iron and sodium as the main minerals present. Iron and sodium occur naturally in the embayment rock layers and concentrate as water moves through them. These characteristics are common across wells in Marion County.
Wells in Marion County commonly have chloride, iron, manganese, and nitrate at levels that exceed EPA health standards. Chloride at elevated levels can be a concern for people with heart disease or high blood pressure. Iron and manganese can cause problems with brain development in infants and young children. Nitrate poses a serious health risk to babies under six months old and can interfere with oxygen in the blood.
The moderate iron levels in county wells often cause orange or brown staining on sinks, toilets, and laundry. You might notice a metallic taste in your water or see rust-colored buildup on fixtures. The good news is that the water in this county is relatively soft, so you should not experience heavy scale buildup or shortened appliance lifespans like homeowners with very hard water do.
We recommend testing your well to find out exactly what is in your water, since every well is different and yours could have higher or lower levels than what is common across the county. A comprehensive metals and minerals panel typically costs between two hundred and four hundred dollars and will show you what you are dealing with. Testing is the only way to know if treatment is needed, and options like chloride removal systems or iron filters can address multiple concerns at once.
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 | 45 | 20% | Moderate | High | |
| Chloride | 35 | 17% | Moderate | High | |
| Manganese | 15 | 13% | Moderate | Moderate | |
| Nitrate | 19 | 5% | Moderate | Moderate | |
| Arsenic | 15 | 0% | Moderate | Safe | |
| Fluoride | 109 | 0% | High | Low | |
| HFPO-DA (GenX) ⓘ municipal | 2 | 0% | Low | Safe ⓘ | |
| Lead | 15 | 0% | Moderate | Low | |
| PFHxS ⓘ municipal | 2 | 0% | Low | Safe ⓘ | |
| PFNA ⓘ municipal | 2 | 0% | Low | Safe ⓘ | |
| PFOA ⓘ municipal | 2 | 0% | Low | Safe ⓘ | |
| PFOS ⓘ municipal | 2 | 0% | Low | Safe ⓘ | |
| Sulfate | 35 | 0% | Moderate | Low | |
| Uranium | 3 | 0% | Low | Safe ⓘ | |
| Sodium | 35 | — | Moderate | Low | |
| pH | 34 | — | Moderate | Low | |
| PFBS ⓘ municipal | 2 | — | Low | Safe ⓘ | |
| Hardness | 35 | — | 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.
Order a Tap Score Test →Population-level CDC data. Not individual risk prediction.
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