No contaminants have been detected in Jefferson County's groundwater, so contaminant levels here are low. Well owners in this county do not face concerns about chemical or bacterial contamination based on available testing data.
The surficial aquifer that supplies water to this county sits in sandy and permeable soil close to the land surface. This shallow position actually helps keep contamination low because sandy soil acts as a natural filter, allowing rainwater to pass through and clean itself before reaching the aquifer below. The sandy geology of this region does not naturally produce or concentrate harmful substances in the water.
Information about mineral content such as hardness, iron, and sulfate is not available for Jefferson County wells. Based on the sandy surficial aquifer here, water in this county typically does not carry high levels of minerals that create hardness or staining. Water quality varies from well to well across the county, so testing your specific well can tell you exactly what minerals it contains.
County well water testing has not detected any contaminants that exceed EPA health standards. This is good news for Jefferson County residents. However, water quality can vary from well to well, so testing your specific well remains important for peace of mind.
Information about mineral content in county wells is not currently available, so we cannot describe what aesthetic issues you might encounter. Some wells in the area could have iron, hard water, or other minerals that affect taste, odor, or staining on fixtures. Without data specific to your location, it is hard to predict what your water will be like.
We recommend testing your well to find out exactly what is in your water. Every well is different, and yours may have different characteristics than others in the county. A basic screening for bacteria and nitrate costs around fifty to one hundred dollars and gives you important baseline information. If testing reveals any concerns, treatment options like filtration or ion exchange can address specific problems.
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 | 56 | 39% | Moderate | High | |
| Manganese | 56 | 4% | Moderate |
Moderate
Elevated concentration, not % above limit
|
|
| Lead | 55 | 0% | Moderate | Low | |
| Sulfate | 105 | 0% | High | Low | |
| Nitrate | 48 | 0% | Moderate | Low | |
| PFHxS ⓘ municipal | 6 | 0% | Low | Safe ⓘ | |
| PFOS ⓘ municipal | 6 | 0% | Low | Safe ⓘ | |
| Fluoride | 105 | 0% | High | Low | |
| HFPO-DA (GenX) ⓘ municipal | 6 | 0% | Low | Safe ⓘ | |
| Nitrite | 48 | 0% | Moderate | Low | |
| Arsenic | 55 | 0% | Moderate | Low | |
| Chloride | 105 | 0% | High | Low | |
| PFNA ⓘ municipal | 6 | 0% | Low | Safe ⓘ | |
| PFOA ⓘ municipal | 6 | 0% | Low | Safe ⓘ | |
| pH | 105 | — | High | Low | |
| Sodium | 103 | — | High | Low | |
| PFBS ⓘ municipal | 6 | — | Low | Safe ⓘ | |
| E. coli | 7* | 0% | Low | Low ⓘ | |
| Fecal Coliform | 12* | 0% | Low | Low | |
| Hardness | 2 | — | Low | Low ⓘ | |
| Total Coliform | 19* | 0% | 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.
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