Groundwater in Lake County contains iron, manganese, lead, chloride, and sulfate at levels that exceed EPA health standards. These contaminant levels are concerning enough to warrant attention from well owners.
The rock beneath Lake County naturally contains iron and manganese that dissolve into groundwater as it moves slowly underground. Lead enters through corrosion of pipes and plumbing fixtures, while chloride and sulfate seep in from road salt application and mineral dissolution in the bedrock.
Groundwater in this county is hard, driven by elevated calcium and magnesium from the underlying rock composition. The moderate iron concentration and hard minerals accumulate as water sits in contact with these mineral-bearing layers over time. Hard water with elevated iron is common across wells in Lake County.
Wells in Lake County commonly exceed EPA health standards for chloride, iron, lead, manganese, and sulfate. Lead exposure over time can harm your brain and nervous system, especially in children. Iron at elevated levels can cause problems with your organs and blood. Manganese exposure over many years can damage your brain and affect how your nervous system works. Chloride and sulfate don't pose direct health risks at the levels typically found here, but they affect water quality.
Hard water is common in county wells, and the mineral content can leave white, crusty scale buildup on faucets, pipes, and inside appliances. You may notice orange or brown staining on sinks and laundry from iron. The water may taste metallic or have an unpleasant odor. Hard water can shorten the lifespan of water heaters and dishwashers over time.
We recommend testing your well water since every well is different and your water 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 comprehensive metals and minerals panel typically costs $200-400. Iron removal filters or water softeners can help address these 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 | 10 | 40% | Low | High | |
| Manganese | 10 | 30% | Low | High | |
| Lead | 8 | 25% | Low | High ⓘ | |
| Sulfate | 10 | 20% | Low | High | |
| Chloride | 10 | 10% | Low | Moderate | |
| Arsenic | 10 | 0% | Low | Low | |
| Fluoride | 10 | 0% | Low | Low | |
| Nitrite | 6 | 0% | Low | Low ⓘ | |
| Nitrate | 6 | 0% | Low | Low ⓘ | |
| Radon | 1 | 0% | Low | Low ⓘ | |
| Uranium | 6 | 0% | Low | Low ⓘ | |
| pH | 12 | — | Low | Low | |
| Sodium | 10 | — | Low | Low | |
| Hardness | 10 | — | 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.
Order a Tap Score Test →Population-level CDC data. Not individual risk prediction.
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