Groundwater in Presque Isle County contains iron and manganese at levels that exceed EPA health standards, along with arsenic at lower concentrations. These contaminant levels are concerning enough that well owners should test their water and consider treatment.
Iron and manganese dissolve naturally from the rock layers beneath this county. The bedrock here contains iron-bearing minerals that slowly release these metals as groundwater moves through tiny cracks and spaces over many years. Arsenic also occurs naturally in small amounts within these same rock formations.
Groundwater in this county is very hard, driven by elevated calcium and magnesium from the limestone and related rock below. The slow movement of water through these mineral-rich layers concentrates hardness along with moderate sulfate and sodium. Hard water with elevated iron is common across wells in this county.
Wells in this county commonly contain iron and manganese at levels that exceed EPA health standards. Long-term exposure to elevated iron can harm your health over time. Manganese exposure has been linked to nervous system and memory problems, especially in children. Arsenic also appears in some county wells at low levels, which is a concern because even small amounts can add up over a lifetime.
Wells in this county are very hard, which means mineral buildup happens fast. Iron leaves orange or rust-colored stains on sinks, toilets, and laundry. The water may taste metallic or have an unpleasant odor. Manganese causes dark brown stains. The extreme hardness can shorten the lifespan of water heaters and dishwashers over time.
We recommend testing your well water to find out what is actually in it. 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 for certain so you can treat it properly. A comprehensive metals and minerals panel typically runs $200-400 and can check for iron, manganese, arsenic, and other contaminants. Depending on results, treatment options like iron removal filters or water softeners may 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 ⓘ |
|---|---|---|---|---|---|
| Iron | 3 | 33% | Low | High ⓘ | |
| Manganese | 3 | 33% | Low | High ⓘ | |
| PFNA | 1 | 0% | Low | Safe ⓘ | |
| PFOA | 4 | 0% | Low | Safe ⓘ | |
| PFOS | 1 | 0% | Low | Safe ⓘ | |
| Lead | 3 | 0% | Low | Safe ⓘ | |
| Nitrate | 2 | 0% | Low | Low ⓘ | |
| Sulfate | 2 | 0% | Low | Low ⓘ | |
| Fluoride | 2 | 0% | Low | Low ⓘ | |
| Nitrite | 2 | 0% | Low | Safe ⓘ | |
| Arsenic | 2 | 0% | Low | Low ⓘ | |
| Chloride | 2 | 0% | Low | Low ⓘ | |
| Uranium | 2 | 0% | Low | Low ⓘ | |
| pH | 3 | — | Low | Low ⓘ | |
| Sodium | 2 | — | Low | Low ⓘ | |
| Hardness | 2 | — | 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.
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