Groundwater in Gratiot County contains iron, manganese, and arsenic. Several of these contaminants exceed EPA health standards and warrant attention.
These contaminants come from the bedrock itself. The mixed rocks beneath the county--including iron-rich layers--release these elements as groundwater moves slowly through cracks and spaces underground. Low-oxygen conditions deep below the surface speed up this process.
Groundwater in this county is high in iron and has elevated sulfate. Iron dissolves from the rocks as water sits in contact with them over time, and sulfate occurs naturally in the minerals here. These characteristics show up across many wells in the county.
Arsenic, chloride, iron, manganese, and sulfate exceed EPA health standards in wells throughout Gratiot County. Arsenic is the most serious concern--it builds up in your body over time and can increase your risk of cancer, heart disease, and diabetes. Chloride at elevated levels can affect people managing high blood pressure or heart conditions. Manganese exposure over many years can harm brain function. Iron and sulfate themselves do not pose direct health risks at the levels found here, but they do indicate the mineral character of your groundwater.
Hard water in this county creates visible problems. Iron stains sinks, toilets, and laundry orange or reddish-brown. Sulfate can give water a bitter or off taste. These minerals build up as scale inside pipes and on fixtures. Over time, this mineral buildup can shorten the lifespan of water heaters and dishwashers.
We recommend testing your well water through a certified lab, 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. Because multiple analytes exceed standards here, a comprehensive metals and minerals panel is recommended, which typically costs $200-400. Arsenic removal systems and iron filters are treatment options worth discussing with a water professional once you have your results.
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 | 22 | 91% | Moderate | High | |
| Sulfate | 22 | 36% | Moderate | High | |
| Manganese | 22 | 32% | Moderate | High | |
| Arsenic | 21 | 19% | Moderate | High | |
| Chloride | 26 | 8% | Moderate | Moderate | |
| PFHxS ⓘ municipal | 10 | 0% | Low | Safe | |
| PFNA ⓘ municipal | 10 | 0% | Low | Safe | |
| PFOA ⓘ municipal | 10 | 0% | Low | Safe | |
| PFOS ⓘ municipal | 10 | 0% | Low | Safe | |
| Radon | 1 | 0% | Low | Safe ⓘ | |
| Uranium | 1 | 0% | Low | Safe ⓘ | |
| Fluoride | 21 | 0% | Moderate | Low | |
| HFPO-DA (GenX) ⓘ municipal | 10 | 0% | Low | Safe | |
| Lead | 1 | 0% | Low | Safe ⓘ | |
| Nitrate | 2 | 0% | Low | Low ⓘ | |
| Nitrite | 1 | 0% | Low | Low ⓘ | |
| Sodium | 21 | — | Moderate | Low | |
| pH | 22 | — | Moderate | Low | |
| PFBS ⓘ municipal | 10 | — | Low | Safe | |
| Hardness | 22 | — | 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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