Groundwater in Emmet County contains iron, arsenic, and chloride. Iron reaches a moderate level that exceeds EPA health standards, while arsenic and chloride levels are low and not concerning.
Iron dissolves naturally from rock layers deep underground as water sits in contact with iron-bearing minerals. The limestone and bedrock in this area release iron into the water over time. Arsenic also occurs naturally in these same rock layers, and chloride appears at low levels, likely from road salt that seeps down in some locations.
Groundwater in this county is moderately hard, driven by elevated calcium and magnesium from the limestone below. The slow movement of water through cracks in the rock allows these minerals to dissolve and build up in the water. Hard water is common across wells in this county, though the degree varies from well to well.
Iron exceeds EPA health standards in wells throughout this county. Long-term exposure to elevated iron can affect your organs and body systems over time. Iron is not an immediate poison, but continuous exposure to high levels is a health concern worth addressing.
Wells in this county show moderately hard water, which leaves white crusty buildup on pipes and fixtures. You may notice staining on sinks, toilets, and laundry from iron. The water might taste metallic or have an unpleasant odor. Over time, mineral buildup can shorten the lifespan of water heaters and dishwashers.
We recommend testing your well water, since every well is different and yours may have higher or lower levels than what is common here. Testing is the only way to know what is actually in your well so you can treat it properly. A basic health screen for bacteria and nitrate runs around fifty to one hundred dollars. An iron filter system can remove iron and improve your water quality.
| Contaminant | Samples ⓘ | % Above MCL ⓘ | Distribution ⓘ | Confidence ⓘ | Risk ⓘ |
|---|---|---|---|---|---|
| Iron | 11 | 9% | 64% · 27% · 9% | Low | Moderate |
| Fluoride | 3 | 0% | 100% · 0% · 0% | Low | Low ⓘ |
| Chloride | 59 | 0% | 100% · 0% · 0% | Moderate | Low |
| Sulfate | 10 | 0% | 100% · 0% · 0% | Low | Low |
| PFNA ⓘ municipal | 8 | 0% | 100% · 0% · 0% | Low | Safe ⓘ |
| PFOS ⓘ municipal | 8 | 0% | 100% · 0% · 0% | Low | Safe ⓘ |
| Uranium | 2 | 0% | 100% · 0% · 0% | Low | Low ⓘ |
| PFOA ⓘ municipal | 8 | 0% | 100% · 0% · 0% | Low | Safe ⓘ |
| PFHxS ⓘ municipal | 8 | 0% | 100% · 0% · 0% | Low | Safe ⓘ |
| HFPO-DA (GenX) ⓘ municipal | 8 | 0% | 100% · 0% · 0% | Low | Safe ⓘ |
| Arsenic | 2 | 0% | 100% · 0% · 0% | Low | Low ⓘ |
| E. coli | 1 | 0% | 100% · 0% · 0% | Low | Safe ⓘ |
| Nitrite | 1 | 0% | 100% · 0% · 0% | Low | Safe ⓘ |
| Lead | 1 | 0% | 100% · 0% · 0% | Low | Safe ⓘ |
| Manganese | 1 | 0% | 100% · 0% · 0% | Low | Safe ⓘ |
| Hardness | 3 | — | — | Low | Low ⓘ |
| pH | 9 | — | — | Low | Low ⓘ |
| Nitrate | 1 | 0% | 100% · 0% · 0% | Low | Safe ⓘ |
| Sodium | 13 | — | — | Low | Low |
| PFBS ⓘ municipal | 8 | — | 100% · 0% · 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.
Data shows potential risk — a certified test confirms whether your water is affected.
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