Groundwater in Hall County contains radon, manganese, and nitrate, with levels of manganese and nitrate exceeding EPA health standards. Radon is also present at levels that exceed the EPA's recommended action level.
The crystalline rock beneath Hall County naturally releases manganese and radon as groundwater moves through fractures and cracks in the stone. Nitrate can come from both natural soil breakdown and human activities like fertilizer use on farms and lawns, reaching groundwater through the rock layers.
Groundwater in Hall County is moderately hard, driven by calcium and magnesium that dissolve from the underlying crystalline rock. Iron and sulfate levels remain low in this area, so the water has a clean mineral character beyond its hardness. Moderate hardness appears across most wells in the county.
Manganese, nitrate, and radon are found in wells throughout Hall County at levels that exceed EPA health standards. Manganese can harm your nervous system and affect how your brain develops, especially in children. Nitrate is dangerous for infants and can interfere with how blood carries oxygen in their bodies. Radon is a radioactive gas that can increase your risk of lung cancer when breathed in over many years.
The mineral content in Hall County wells is moderately hard, but iron and sodium levels are low. You should not see much staining or buildup in your pipes or fixtures. The water should not have a strong taste or smell that bothers you. Moderate hardness might shorten the lifespan of water heaters and dishwashers over time, but this is not a major concern.
Every well is different, and your water could have higher or lower levels of these contaminants than what is common in the county. Testing is the only way to know what is actually in your well so you can treat it properly. We recommend a comprehensive testing panel that checks for metals, minerals, bacteria, and radon--this typically costs two hundred to four hundred dollars. Aeration systems and activated carbon filters can remove some of these contaminants from your water.
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 ⓘ |
|---|---|---|---|---|---|
| Radon | 1 | 100% | Low | High ⓘ | |
| Manganese | 5 | 40% | Low | High ⓘ | |
| Nitrate | 4 | 25% | Low | High ⓘ | |
| Arsenic | 1 | 0% | Low | Low ⓘ | |
| PFOS ⓘ municipal | 6 | 0% | Low | Safe ⓘ | |
| PFHxS ⓘ municipal | 6 | 0% | Low | Safe ⓘ | |
| Sulfate | 8 | 0% | Low | Low ⓘ | |
| Uranium | 1 | 0% | Low | Low ⓘ | |
| PFHxS ⓘ municipal | 6 | 0% | Low | Safe ⓘ | |
| HFPO-DA (GenX) ⓘ municipal | 6 | 0% | Low | Safe ⓘ | |
| Arsenic | 1 | 0% | Low | Low ⓘ | |
| Chloride | 8 | 0% | Low | Low ⓘ | |
| Fluoride | 8 | 0% | Low | Low ⓘ | |
| Iron | 5 | 0% | Low | Low ⓘ | |
| Lead | 1 | 0% | Low | Low ⓘ | |
| Nitrite | 1 | 0% | Low | Safe ⓘ | |
| PFNA ⓘ municipal | 6 | 0% | Low | Safe ⓘ | |
| PFOA ⓘ municipal | 6 | 0% | Low | Safe ⓘ | |
| PFOS ⓘ municipal | 6 | 0% | Low | Safe ⓘ | |
| Sulfate | 8 | 0% | Low | Low ⓘ | |
| Uranium | 1 | 0% | Low | Low ⓘ | |
| pH | 8 | — | Low | Low ⓘ | |
| Sodium | 8 | — | Low | Low ⓘ | |
| Hardness | 8 | — | Low | Low ⓘ | |
| PFBS ⓘ municipal | 6 | — | Low | Safe ⓘ |
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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