Pierce County Lake Quality
Minnesota, 1 lake, measured by Minnesota PCA
Pierce County has 1 monitored lake — 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. Every one of those lake carries recent nutrient and algae readings, so the county-level summary covers the full set rather than a monitored subset. Most monitored lakes in Pierce County carry favourable nutrient and algae readings for Minnesota.
A meaningful share of Pierce's lakes break 50 feet of depth, which matters because deep lakes hold cooler water all summer and resist the resuspended-sediment problems that plague shallow basins. The county's cleanest lake on the readings is Lake St Croix.
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Quick Answers for Pierce County
Planning a trip? Check special fishing regulations for Lake St Croix, whether the fish are safe to eat, and the best times to fish — or browse the full Minnesota regulations index.
All Lakes in Pierce County
1 lake1 lake ranked on readings
| # | Lake | Clarity | Phosphorus | Algae | Trophic | Max Depth | Access |
|---|---|---|---|---|---|---|---|
| 1 | Lake St CroixPierce | 7.2 ft | 32.5 µg/L | No recent samples | No recent samples | 78 ft | ✓ Public |
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Other Counties in Minnesota
Browse every Minnesota lake, or the full directory of lakes across all United States (49 states), Canada (Ontario, Québec, Nova Scotia, British Columbia and Newfoundland and Labrador), and 38 other country hubs..
Source: the Minnesota Pollution Control Agency and the Minnesota DNR. See data sources.