Iron, chloride, and fecal coliform have been detected in Columbia County's groundwater. Iron exceeds the EPA health standard in this area, which is a concern for well owners.
The crystalline rock beneath Columbia County contains iron minerals that dissolve slowly into water as it moves through cracks and spaces in the stone. Fecal coliform comes from surface contamination entering wells through poor construction or cracks in the well casing. Chloride can enter groundwater from road salt, septic systems, or naturally weathered rock.
Groundwater in this county is soft, with low iron levels overall, low sodium, and low sulfate. The crystalline rock here does not naturally produce the mineral-rich water seen in areas with limestone or shale layers below the surface. Most wells in Columbia County show these same soft-water characteristics, though individual wells vary in their contaminant levels.
Iron is turning up at levels that exceed EPA health standards in wells across Columbia County. When iron gets into drinking water at high levels, it can cause problems with how your body absorbs other nutrients and minerals. This is especially concerning for children and people with certain health conditions. Your body needs some iron, but too much from your water can add up over time.
Wells in this county with elevated iron often show orange or brown staining on sinks, toilets, and laundry. You might notice a metallic taste in your water or see rust-colored buildup on faucet screens. These stains are tough to clean and can discolor clothes and dishes. The water may look cloudy or rusty when it first comes out of the tap.
We recommend testing your well water right away since every well is different and yours could have much higher or lower iron levels than what is typical in the county. Testing is the only way to know exactly what is in your water so you can treat it properly. A basic screening that checks for bacteria and common minerals runs about fifty to one hundred dollars, while a comprehensive panel costs two hundred to four hundred dollars. Iron can be removed using sediment filters or iron-specific treatment systems.
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 | 30 | 10% | Moderate | Moderate | |
| Sulfate | 34 | 0% | Moderate | Low | |
| PFOS ⓘ municipal | 8 | 0% | Low | Safe ⓘ | |
| PFHxS ⓘ municipal | 8 | 0% | Low | Safe ⓘ | |
| Nitrate | 34 | 0% | Moderate | Low | |
| Sulfate | 34 | 0% | Moderate | Low | |
| PFOS ⓘ municipal | 8 | 0% | Low | Safe ⓘ | |
| PFNA ⓘ municipal | 8 | 0% | Low | Safe ⓘ | |
| Nitrite | 30 | 0% | Moderate | Low | |
| HFPO-DA (GenX) ⓘ municipal | 8 | 0% | Low | Safe ⓘ | |
| Chloride | 34 | 0% | Moderate | Low | |
| Fluoride | 34 | 0% | Moderate | Low | |
| Nitrate | 34 | 0% | Moderate | Low | |
| PFHxS ⓘ municipal | 8 | 0% | Low | Safe ⓘ | |
| PFOA ⓘ municipal | 8 | 0% | Low | Safe ⓘ | |
| pH | 34 | — | Moderate | Low | |
| Sodium | 34 | — | Moderate | Low | |
| PFBS ⓘ municipal | 8 | — | Low | Safe ⓘ | |
| Hardness | 34 | — | 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 →Loading recent water news…