Well water in Logan County, Nebraska
In Logan County, none of 61 tested well samples exceeded the EPA limit for nitrate, based on public data from Nebraska Groundwater Quality Clearinghouse and USGS Water Quality Portal.
61 individual samples from 39 wells, 1983 to 2024. Data refreshed September 9, 2026.
What individual samples found
Each row summarizes every public sample for that contaminant inside Logan County. Above limit means above the EPA maximum contaminant level; where EPA has no enforceable limit, the row shows a health guideline or nuisance level instead.
| Contaminant | Samples | Detected | Above limit | Median | Highest | Limit | |
|---|---|---|---|---|---|---|---|
| Nitrate 1983 to 2024 | 61 | 98% | 0% | 1.5 | 2.77 | 10 mg/L EPA limit |
Sampled fewer than 10 times, too few to summarize: Uranium (4), Arsenic (1), Radon (1).
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What this means
Among contaminants with a federal limit, no tested sample in Logan County came back above it. That is reassuring, but sampling is uneven: wells that were never tested are not in this data.
What to test for in Logan County
- Coliform bacteriaRecommended for every private well, every year.
- RadonMedian local reading is 240 pCi/L.
- NitrateRecommended for every private well, especially near farms or septic systems.
Get your Logan County water tested at home
A licensed local water treatment company tests your tap water in your home, walks you through the numbers, and quotes treatment only if something needs fixing. Free, about 30 minutes, no obligation. Tell us what you need and we match you with a company that serves Logan County.
Common questions
Is there arsenic in well water in Logan County?
Arsenic was detected in 100% of 1 public well samples in Logan County, and 0% were above the EPA limit of 10 ug/L. Arsenic has no taste or smell; a lab test is the only way to know your level.
How high is radon in well water in Logan County?
The median radon level across 1 public samples in Logan County was 240 pCi/L, with a high of 240 pCi/L. New Hampshire recommends treatment above 2,000 pCi/L.
How often should I test a private well in Logan County?
Test for bacteria and nitrate every year. Test once for arsenic, uranium, radon, fluoride, manganese and PFAS, then again every three to five years or after any change in taste, color, or plumbing.
Sources
- Nebraska Groundwater Quality Clearinghouse: 60 samples in Logan County. Groundwater quality results compiled by the Nebraska Department of Environment and Energy, University of Nebraska and Nebraska Department of Agriculture in the Groundwater Quality Clearinghouse, contributed by Natural Resources Districts and state agencies. Retrieved September 9, 2026.
- USGS Water Quality Portal: 7 samples in Logan County. Data from the Water Quality Portal, a service of USGS, EPA and USDA; groundwater samples collected by USGS and cooperators. Retrieved September 3, 2026.
Non-detects count as samples and are treated as zero when computing medians. Exactly at the limit counts as not above it. A sample belongs to the town containing the well's reported coordinates.