Groundwater in Noble County contains pfoa, chloride, and fluoride. Pfoa exceeds EPA health standards and is a serious concern; chloride and fluoride are present at detectable levels.
Pfoa is an industrial chemical that enters groundwater through contamination from manufacturing, airports, or firefighting activities. Chloride and fluoride leach from minerals in the Pennsylvanian rock layers that underlie this county, and chloride can also rise where salty water has moved through the formation from past oil and gas activity in the region.
Groundwater in this county is very hard, driven by elevated calcium and magnesium from the limestone and carbonate-bearing rocks below. Sodium is also high, which comes from minerals in the shale and sandstone layers. These mineral characteristics are common across wells in Noble County.
Wells in Noble County commonly exceed EPA health standards for PFOA, an industrial chemical used in manufacturing. Long-term exposure to PFOA in drinking water is linked to serious health effects including liver damage, thyroid disease, and immune system problems. PFOA does not break down in the body or the environment, so exposure accumulates over time. Children and pregnant women face particular concern from PFOA contamination.
Wells in this county are extremely hard, which causes white crusty buildup on faucets, showerheads, and inside pipes. The high sodium and sulfate levels give the water a salty or bitter taste that many find unpleasant. Hard water shortens the lifespan of water heaters, dishwashers, and washing machines by causing mineral scale to accumulate inside appliances.
We recommend testing your well to know exactly what contaminants are present, since every well is different and yours 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 metals and minerals panel typically costs $200-400. Treatment options like reverse osmosis systems or ion exchange water softeners can remove PFOA and reduce 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 ⓘ |
|---|---|---|---|---|---|
| PFOA ⓘ municipal | 3 | 67% | Low | High ⓘ | |
| Chloride | 1 | 0% | Low | Low ⓘ | |
| Fluoride | 1 | 0% | Low | Low ⓘ | |
| HFPO-DA (GenX) ⓘ municipal | 3 | 0% | Low | Safe ⓘ | |
| Iron | 1 | 0% | Low | Safe ⓘ | |
| Manganese | 1 | 0% | Low | Safe ⓘ | |
| PFHxS ⓘ municipal | 3 | 0% | Low | Safe ⓘ | |
| PFNA ⓘ municipal | 3 | 0% | Low | Safe ⓘ | |
| PFOS ⓘ municipal | 3 | 0% | Low | Safe ⓘ | |
| Sulfate | 1 | 0% | Low | Low ⓘ | |
| Hardness | 1 | — | Low | Low ⓘ | |
| PFBS ⓘ municipal | 3 | — | Low | Safe ⓘ | |
| pH | 1 | — | Low | Low ⓘ | |
| Sodium | 1 | — | 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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