Groundwater in Columbia County contains iron, chloride, and fecal coliform bacteria. Iron levels exceed the EPA health standard, which is a concern for well owners in this area.
Iron comes from the crystalline rock beneath Columbia County--granite, gneiss, and other hard rocks naturally contain iron minerals that dissolve slowly into groundwater as water moves through cracks and spaces in the rock. Chloride and bacteria can enter wells from surface sources like septic systems, road salt, or animal waste, especially in areas where the water table is shallow or wells are old and not properly sealed.
Groundwater in this county is soft and low in minerals overall, with iron as the main character element, though at levels most wells do not show prominently. The crystalline rock here produces water naturally low in hardness-causing minerals like calcium and magnesium. Soft water and low mineral content are the norm across Columbia County wells.
Wells in Columbia County have been found with iron levels exceeding EPA health standards. Elevated iron in drinking water can cause problems with your blood's ability to carry oxygen and may affect children's development and learning. Iron in well water also poses risks to people with certain genetic conditions that make them sensitive to iron buildup in organs like the heart and liver.
The good news is that well water in this county tends to be soft and low in sodium and sulfate, so you won't run into major scaling problems or salty taste issues. However, iron can still stain your laundry, dishes, and plumbing fixtures with brown or orange marks, and it can create an unpleasant metallic taste in your water.
We recommend testing your well water as soon as you can, since every well is different and yours could have higher or lower iron than the county average. Testing is the only way to find out what is actually in your water so you can treat it properly. A basic screening costs around fifty to one hundred dollars. Iron can be removed with special filters or oxidation systems installed at your well or in your home.
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 ⓘ | |
| Nitrate | 34 | 0% | Moderate | Low | |
| PFHxS ⓘ municipal | 8 | 0% | Low | Safe ⓘ | |
| PFOA ⓘ municipal | 8 | 0% | Low | Safe ⓘ | |
| Hardness | 34 | — | Moderate | Low | |
| PFBS ⓘ municipal | 8 | — | Low | Safe ⓘ | |
| pH | 34 | — | Moderate | Low | |
| Sodium | 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.
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