Groundwater in Holmes County contains radon, manganese, and iron that exceed EPA health standards. Additionally, chloride and sulfate levels are elevated, making this a multi-contaminant situation that well owners should take seriously.
These contaminants come from the Pennsylvanian rock layers beneath the county. As groundwater moves slowly through cracks in shale and other rock, it dissolves iron and manganese naturally present in the stone. Radon seeps directly from the rock itself. The rock's slow-draining nature means water sits in contact with these minerals for a long time, allowing them to build up.
Groundwater in Holmes County is very hard, driven by elevated calcium and magnesium from the surrounding rock. The high iron content adds to the mineral load. Hard water and elevated iron are common across wells in this county, reflecting the widespread character of the underlying Pennsylvanian geology.
Wells in Holmes County commonly have chloride, iron, manganese, radon, and sulfate at levels exceeding EPA health standards. Radon is a radioactive gas that can increase lung cancer risk over time. Chloride and sulfate at high levels can affect how your body processes water and minerals. Iron and manganese are metals that can damage your nervous system and organs with long-term exposure.
County wells are extremely hard, which means white crusty buildup will coat your pipes, fixtures, and water heater. Iron stains will appear on sinks, toilets, and laundry as orange or brown marks. Hard water this severe can shorten the lifespan of water heaters, dishwashers, and other appliances. You may also notice a metallic or sulfur taste in the water.
We recommend testing your well with a comprehensive minerals and metals panel, since multiple contaminants exceed health standards. Every well is different, and your well may have higher or lower levels than what is common in the county. Testing is the only way to know what is actually in your water so it can be properly treated. A comprehensive panel typically costs $200-$400. Treatment options like water softeners combined with radon-removal systems and iron filters can help.
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 | 75 | 53% | Moderate | High | |
| Iron | 84 | 31% | Moderate | High | |
| Sulfate | 16 | 6% | Moderate | Moderate | |
| Chloride | 86 | 1% | Moderate | Low | |
| Arsenic | 70 | 0% | Moderate | Low | |
| Fluoride | 56 | 0% | Moderate | Low | |
| HFPO-DA (GenX) ⓘ municipal | 2 | 0% | Low | Safe ⓘ | |
| Lead | 72 | 0% | Moderate | Low | |
| Nitrate | 20 | 0% | Moderate | Low | |
| Nitrite | 18 | 0% | Moderate | Low | |
| PFHxS ⓘ municipal | 2 | 0% | Low | Safe ⓘ | |
| PFNA ⓘ municipal | 2 | 0% | Low | Safe ⓘ | |
| PFOA ⓘ municipal | 2 | 0% | Low | Safe ⓘ | |
| PFOS ⓘ municipal | 2 | 0% | Low | Safe ⓘ | |
| Uranium | 1 | 0% | Low | Low ⓘ | |
| Total Coliform | 1* | 0% | Low | Safe ⓘ | |
| Sodium | 86 | — | Moderate | Low | |
| pH | 56 | — | Moderate | Low | |
| PFBS ⓘ municipal | 2 | — | Low | Safe ⓘ | |
| Hardness | 61 | — | Moderate | Low | |
| E. coli | 1* | 0% | 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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