Calhoun County Lake Quality
Michigan, 1 lake — no lake here has enough monitoring data for a grade
Only 1 lakes in Calhoun County carry an active grade. The county-level summary is therefore representative of those specific lakes, not necessarily of every water body in the county.
A meaningful share of Calhoun'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 best-graded lake is Duck Lake (—).
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Quick Answers for Calhoun County
Planning a trip? Check special fishing regulations for Duck Lake, whether the fish are safe to eat, and the best times to fish — or check the official Michigan fishing regulations.
All Lakes in Calhoun County
1 lake · 0 graded, 1 not rated0 graded lakes · 1 not rated, hidden
| # | Lake | Grade | Clarity | Phosphorus | Algae | Trophic | Max Depth | Access |
|---|---|---|---|---|---|---|---|---|
| NRDuck LakeCalhoun | NR | 12 ft | No recent samples | No recent samples | No recent samples | 50 ft | ✓ Public |
NR = not rated: there is not enough recent sampling to support a letter. That is EPA Integrated Reporting Category 3 (insufficient information), not a failing grade. How grading works.
Lake Match
Which lake suits how you actually use one?
Six questions — swimming, fishing, quiet, cabins, drive time — and a shortlist of graded lakes that fit, with the water quality behind each one.
Other Counties in Michigan
See how Calhoun County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all 49 states and 2 Canadian provinces.
Source: EPA National Aquatic Resource Surveys, 2026.