Lemhi County Lake Quality
Idaho, 5 lakes, measured by Idaho DEQ
Lemhi County has 5 monitored lakes — a thin enough sample that one or two stressed lakes can move the county average noticeably. Use the per-lake pages below for what actually matters. The 5 monitored lakes in Lemhi County carry whatever clarity, phosphorus, and chlorophyll-a readings Idaho DEQ has published, shown as reported.
Most of the county's monitored lakes are shallow, under 50 feet, which means wind keeps the water column mixed all summer and sediment-bound phosphorus releases back into the surface layer whenever the bottom is disturbed.
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Quick Answers for Lemhi County
Planning a trip? Check special fishing regulations for Ship Island Lake — or check the official Idaho fishing regulations.
All Lakes in Lemhi County
5 lakes · 0 ranked on readings, 5 without enough sampling0 lakes ranked on readings · 5 without enough sampling, hidden
| # | Lake | Clarity | Phosphorus | Algae | Trophic | Access |
|---|---|---|---|---|---|---|
| Ship Island LakeLemhi | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| Goat LakeLemhi | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| Bear Valley LakesLemhi | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| Williams LakeLemhi | No recent samples | No recent samples | No recent samples | No recent samples | ✓ Public | |
| Mill LakeLemhi | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded |
NR = no nutrient or algae reading on record. The measurements are published as the authority reports them. Where the data comes from.
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Source: the Idaho Department of Environmental Quality. See data sources.