Groundwater in Grand Traverse County contains iron, lead, and manganese that well owners should be aware of. Several of these contaminants exceed EPA health standards, making testing important for your household.
These metals dissolve naturally from the rock layers beneath the county. As groundwater sits in contact with minerals in the bedrock, iron and manganese seep into the water. Lead can enter from older household plumbing as well as from natural sources in the rock.
Groundwater in this county is very hard, driven by elevated calcium and magnesium from the limestone and other carbonate rocks below. The slow movement of water through these mineral-rich layers concentrates these hardness minerals. Very hard water is common across wells in Grand Traverse County.
Wells in Grand Traverse County commonly exceed EPA health standards for arsenic, lead, manganese, iron, and nitrate. Arsenic is a poison that builds up in your body over years and increases cancer risk. Lead harms the brain and nervous system, especially in children, and there is no safe level of exposure. Manganese at elevated levels can affect the nervous system and cause nerve damage. Iron and nitrate also pose health risks with long-term exposure.
Hard water is very common in this county and will leave white, crusty scale on faucets, pipes, and inside appliances. You may notice orange or rust-colored staining on sinks and toilets from iron. Your water might taste metallic or bitter. The extremely hard water 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 well so it can be properly treated. A basic health screen runs $50-100, and a comprehensive metals and minerals panel costs $200-400. Iron filters or reverse osmosis systems can help address multiple concerns.
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 | 39 | 33% | Moderate | High | |
| Lead | 39 | 18% | Moderate | High | |
| Manganese | 39 | 13% | Moderate | Moderate | |
| Arsenic | 38 | 3% | Moderate | Low | |
| Nitrate | 219 | 1% | High | Low | |
| Chloride | 218 | 0% | High | Low | |
| Fluoride | 38 | 0% | Moderate | Low | |
| HFPO-DA (GenX) ⓘ municipal | 14 | 0% | Low | Safe | |
| Nitrite | 219 | 0% | High | Low | |
| PFHxS ⓘ municipal | 14 | 0% | Low | Safe | |
| PFNA ⓘ municipal | 15 | 0% | Moderate | Safe | |
| PFOA ⓘ municipal | 15 | 0% | Moderate | Safe | |
| PFOS ⓘ municipal | 14 | 0% | Low | Safe | |
| Radon | 1 | 0% | Low | Low ⓘ | |
| Sulfate | 38 | 0% | Moderate | Low | |
| Uranium | 4 | 0% | Low | Low ⓘ | |
| Sodium | 38 | — | Moderate | Low | |
| pH | 219 | — | High | Low | |
| PFBS ⓘ municipal | 14 | — | Low | Low | |
| Hardness | 38 | — | 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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