Contaminant levels in Lake County groundwater are low across the board. No harmful substances exceed EPA health standards, which means well owners here have groundwater that is clean from a health perspective.
The local geology keeps contamination down. Lake County sits on sand and sandy soil layers that naturally filter water as it moves underground. These materials act like a screen that stops many pollutants from reaching the aquifer, and the area's land use patterns do not create major sources of chemical pollution that would overwhelm this natural protection.
Information about hardness and minerals in Lake County's groundwater is not available from recent testing. The surficial aquifer here is made of sand and sandy materials, which typically allow water to pick up some minerals but not in high amounts compared to limestone areas. Wells across the county vary in their mineral content, so your water's character will depend on your specific location and depth.
The good news is that Lake County wells show no contaminants exceeding EPA health standards in the county-level data. This means the water quality across the county is generally meeting federal health guidelines. However, this county-level information tells you what is common across the area, not what is in your specific well.
While major health concerns are not showing up in county data, mineral content in well water can still affect your daily life. Hard water can leave spots on dishes and shower doors, reduce the effectiveness of soap, and cause scale buildup in pipes and appliances. If your well has high mineral levels, this scale can shorten the lifespan of water heaters and dishwashers over time.
We recommend testing your well water to find out exactly what is in it, since every well is different and your water may have different levels than what is common in the county. A basic screening for bacteria and nitrate runs about fifty to one hundred dollars and gives you a starting point. Testing is the only way to know what treatment, if any, your well actually needs.
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 ⓘ |
|---|---|---|---|---|---|
| PFOS ⓘ municipal | 83 | 41% | Moderate | High | |
| Iron | 630 | 21% | High | High | |
| PFOA ⓘ municipal | 83 | 18% | Moderate | High | |
| Chloride | 655 | 10% | High | Moderate | |
| Manganese | 580 | 3% | High |
Moderate
Elevated concentration, not % above limit
|
|
| Nitrate | 35 | 3% | Moderate | Low | |
| Sulfate | 578 | 3% | High | Low | |
| PFHxS ⓘ municipal | 83 | 1% | Moderate | Low | |
| Arsenic | 576 | 0% | High | Low | |
| Lead | 579 | 0% | High | Low | |
| Radon | 3 | 0% | Low | Low ⓘ | |
| Uranium | 3 | 0% | Low | Low ⓘ | |
| PFNA ⓘ municipal | 83 | 0% | Moderate | Low | |
| Fluoride | 129 | 0% | High | Low | |
| HFPO-DA (GenX) ⓘ municipal | 83 | 0% | Moderate | Safe | |
| Nitrite | 33 | 0% | Moderate | Low | |
| pH | 660 | — | High | Low | |
| Sodium | 655 | — | High | Low | |
| Hardness | 58 | — | Moderate | Low | |
| Total Coliform | 44* | 0% | Moderate | Low | |
| E. coli | 19* | 0% | Moderate | Low | |
| Fecal Coliform | 25* | 0% | Moderate | Low | |
| PFBS ⓘ municipal | 83 | — | 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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