Eau Claire County Lake Quality
Wisconsin, 8 lakes, measured by Wisconsin DNR
Eau Claire County has 8 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. 2 of those lakes carry recent nutrient and algae readings. The county-level summary describes that subset, not every water body listed. Most monitored lakes in Eau Claire County are productive, shallow basins; each lake page shows its own phosphorus and chlorophyll-a readings beside the EPA condition class.
The county's lakes lean shallow, which makes the readings sensitive to wind, sediment-resuspension, and any nutrient inputs from the watershed. The cleanest measured lake is Altoona Lake.
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Quick Answers for Eau Claire County
Planning a trip? Check special fishing regulations for Altoona Lake, whether the fish are safe to eat, and the best times to fish — or browse the full Wisconsin regulations index.
Fishing in Eau Claire County
DNR Reports (1)
Wisconsin DNR Fisheries Survey resources for lakes in Eau Claire County. browse all reports →
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- 2025Lake Altoona spring netting/shocking survey, 2025Netting Survey · WI DNR · 2025 (PDF)
All Lakes in Eau Claire County
8 lakes · 2 ranked on readings, 6 without enough sampling2 lakes ranked on readings · 6 without enough sampling, hidden
| # | Lake | Clarity | Phosphorus | Algae | Trophic | Max Depth | Access |
|---|---|---|---|---|---|---|---|
| 1 | Altoona LakeEau Claire | 3 ft | 99.6 µg/L | No recent samples | No recent samples | 25 ft | ✓ Public |
| 2 | Eau Claire LakeEau Claire | 2.8 ft | 88 µg/L | No recent samples | No recent samples | 25 ft | ✓ Public |
| Fairchild PondEau Claire | No recent samples | 30.4 µg/L | No recent samples | No recent samples | No recent samples | Not recorded | |
| Elk Creek LakeEau Claire | No recent samples | No recent samples | No recent samples | No recent samples | 17 ft | ✓ Public | |
| Dells PondEau Claire | No recent samples | No recent samples | No recent samples | No recent samples | 30 ft | Not recorded | |
| Cooley LakeEau Claire | No recent samples | No recent samples | No recent samples | No recent samples | 8 ft | Not recorded | |
| Dells MillpondEau Claire | No recent samples | No recent samples | No recent samples | No recent samples | 16 ft | Not recorded | |
| Coon Fork LakeEau Claire | No recent samples | No recent samples | No recent samples | No recent samples | 20 ft | ✓ Public |
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 Wisconsin Department of Natural Resources. See data sources.