Groundwater in Greene County contains radon, arsenic, and chloride. Radon is the only contaminant exceeding EPA health standards in this county, while arsenic and chloride are present but at levels below the health limit.
These contaminants come from the natural rock beneath Greene County. Radon seeps from cracks in the crystalline rock that makes up the bedrock here. Arsenic and chloride occur naturally as the groundwater moves slowly through this ancient rock, picking up minerals over time. The same rock type underlies the neighboring counties in this region.
Groundwater in Greene County is moderately hard, driven mainly by calcium and magnesium from the crystalline rock below. As water moves through the rock fractures, it dissolves these minerals over years and decades. Iron, sodium, and sulfate levels are low, so the water is not notably affected by those elements. Most wells in this county show this same pattern of moderate hardness with low concentrations of iron and other minerals.
Wells in Greene County sometimes have radon at levels that exceed EPA health standards. Radon is a radioactive gas that comes from rock and soil underground. When radon gets into your well water and you use that water, radon can enter the air in your home. Breathing radon gas over many years can increase your risk of lung cancer.
The mineral content in county wells is moderate overall. Your water might leave some staining on fixtures or inside pipes from iron, though levels here are quite low. You may notice some scale buildup on faucets and appliances from the moderately hard water, which over time can reduce how long water heaters and dishwashers last.
We recommend testing your well for radon and other contaminants since every well is different and your water could have higher or lower levels than what is common in the county. A comprehensive test that checks for radon, bacteria, metals, and minerals costs between two hundred and four hundred dollars and is the only way to know what is actually in your water so you can treat it properly. Radon can be removed with aeration systems or carbon filters designed for this purpose.
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 | 2 | 100% | Low | High ⓘ | |
| PFOA ⓘ municipal | 15 | 0% | Moderate | Safe | |
| Chloride | 7 | 0% | Low | Low ⓘ | |
| PFNA ⓘ municipal | 15 | 0% | Moderate | Safe | |
| Fluoride | 7 | 0% | Low | Low ⓘ | |
| HFPO-DA (GenX) ⓘ municipal | 15 | 0% | Moderate | Safe | |
| Nitrite | 3 | 0% | Low | Low ⓘ | |
| Arsenic | 3 | 0% | Low | Low ⓘ | |
| Iron | 3 | 0% | Low | Low ⓘ | |
| Nitrite | 3 | 0% | Low | Low ⓘ | |
| HFPO-DA (GenX) ⓘ municipal | 15 | 0% | Moderate | Safe | |
| Fluoride | 7 | 0% | Low | Low ⓘ | |
| Lead | 3 | 0% | Low | Low ⓘ | |
| Manganese | 3 | 0% | Low | Low ⓘ | |
| Nitrate | 7 | 0% | Low | Low ⓘ | |
| PFHxS ⓘ municipal | 15 | 0% | Moderate | Safe | |
| PFOS ⓘ municipal | 15 | 0% | Moderate | Safe | |
| Sulfate | 7 | 0% | Low | Low ⓘ | |
| Uranium | 2 | 0% | Low | Low ⓘ | |
| Hardness | 7 | — | Low | Low ⓘ | |
| PFBS ⓘ municipal | 15 | — | Moderate | Low | |
| Sodium | 7 | — | Low | Low ⓘ | |
| pH | 7 | — | Low | 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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