Groundwater in Caswell County contains radon, manganese, and arsenic. Manganese and radon exceed EPA health standards in this county's wells, making these two contaminants a concern for your water supply.
These contaminants come from the crystalline rock beneath the county. The Piedmont and Blue Ridge rock formations naturally contain uranium that breaks down into radon, and minerals that release manganese and arsenic into groundwater as water moves through fractures and pores in the rock.
Groundwater in Caswell County is hard, driven by calcium and magnesium released from the crystalline rock as water flows through it. This hard-water character is widespread across wells in the county because the bedrock geology is uniform across the area.
Wells in Caswell County commonly exceed EPA health standards for manganese and radon. Manganese can harm your nervous system and affect how your brain works, especially in children. Radon is a radioactive gas that enters groundwater naturally and increases your risk of lung cancer when you breathe it in over time. Arsenic is also a concern in county wells and can damage your kidneys and increase cancer risk.
County wells are hard, which means you will likely see white scale buildup on faucets and inside pipes. Your water heater and dishwasher may wear out faster because of this hardness. You might notice spots on dishes after they dry, and soap will not lather as easily as it should. The moderate iron levels mean some wells show reddish or brown staining on sinks and laundry.
We recommend a comprehensive water test to find out what is actually in your well, since every well is different and yours could have higher or lower levels than what is common here. Testing is the only way to know what needs to be treated. A full metals and minerals panel costs between $200 and $400. Treatment options include aeration for iron, activated carbon filters for radon, and water softeners for hardness.
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 | 3 | 33% | Low | High ⓘ | |
| Manganese | 7 | 29% | Low | High ⓘ | |
| Arsenic | 3 | 0% | Low | Low ⓘ | |
| Chloride | 9 | 0% | Low | Low ⓘ | |
| Fluoride | 9 | 0% | Low | Low ⓘ | |
| Iron | 8 | 0% | Low | Low ⓘ | |
| Lead | 3 | 0% | Low | Low ⓘ | |
| Nitrate | 9 | 0% | Low | Low ⓘ | |
| Nitrite | 3 | 0% | Low | Safe ⓘ | |
| Sulfate | 9 | 0% | Low | Low ⓘ | |
| Uranium | 3 | 0% | Low | Low ⓘ | |
| Sodium | 8 | — | Low | Low ⓘ | |
| pH | 7 | — | Low | Low ⓘ | |
| Hardness | 9 | — | 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.
Loading recent water news…