Iron, manganese, and lead are present in Logan County's groundwater and all three exceed EPA health standards. These contamination levels are serious and require testing and treatment.
The bedrock beneath Logan County naturally contains iron and manganese locked inside the rock minerals. As groundwater slowly moves through cracks in the stone, these metals dissolve into the water. Lead typically enters from plumbing materials in older wells rather than from the rock itself.
Groundwater in Logan County is very hard, driven by elevated calcium and magnesium from the limestone and dolomite below. This hardness results from water dissolving these minerals as it seeps through fractured rock over time. Most wells in this county show these hard-water characteristics, along with the elevated iron and manganese.
Iron, lead, and manganese exceed EPA health standards in wells across Logan County. Iron at elevated levels can cause problems with oxygen transport in your blood. Lead is especially dangerous for children and can harm brain development and learning. Manganese can affect nervous system function and development in young people.
Wells in this county are very hard, which means you will see white crusty buildup on faucets and fixtures. The high iron content stains sinks, toilets, and laundry orange-brown. Very hard water can shorten the lifespan of water heaters and dishwashers. You may also notice a metallic taste in your water.
We recommend testing your well because 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. Since multiple analytes exceed health standards, a comprehensive metals and minerals panel is recommended. Treatment options include a water softener paired with an iron filter.
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 ⓘ |
|---|---|---|---|---|---|
| Iron | 97 | 84% | Moderate | High | |
| Manganese | 92 | 43% | Moderate | High | |
| Lead | 94 | 3% | Moderate |
Moderate
Elevated concentration, not % above limit
|
|
| Arsenic | 93 | 0% | Moderate | Low | |
| Chloride | 95 | 0% | Moderate | Low | |
| Fluoride | 55 | 0% | Moderate | Low | |
| HFPO-DA (GenX) ⓘ municipal | 4 | 0% | Low | Safe ⓘ | |
| Nitrite | 5 | 0% | Low | Safe ⓘ | |
| PFHxS ⓘ municipal | 4 | 0% | Low | Safe ⓘ | |
| PFNA ⓘ municipal | 4 | 0% | Low | Safe ⓘ | |
| PFOA ⓘ municipal | 4 | 0% | Low | Safe ⓘ | |
| PFOS ⓘ municipal | 4 | 0% | Low | Safe ⓘ | |
| Radon | 1 | 0% | Low | Low ⓘ | |
| Sulfate | 8 | 0% | Low | Low ⓘ | |
| Uranium | 2 | 0% | Low | Low ⓘ | |
| Nitrate | 10 | 0% | Low | Low | |
| Hardness | 93 | — | Moderate | Low | |
| PFBS ⓘ municipal | 4 | — | Low | Low ⓘ | |
| pH | 87 | — | Moderate | Low | |
| Sodium | 97 | — | Moderate | 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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