Kent County Lake Quality
Michigan, 14 lakes, average grade A (Excellent)
Kent County has 14 graded 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 county's average grade is A — among the cleanest in Michigan. 7 lakes pull an A on their own, and almost none fall into the D or F brackets.
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. Bostwick Lake (A) is the cleanest in the county.
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Quick Answers for Kent County
Planning a trip? Check special fishing regulations for Bostwick Lake — or check the official Michigan fishing regulations.
Fishing in Kent County
All Lakes in Kent County
14 lakes · 7 graded, 7 not rated7 graded lakes · 7 not rated, hidden
| # | Lake | Grade | Clarity | Phosphorus | Algae | Trophic | Max Depth | Access |
|---|---|---|---|---|---|---|---|---|
| 1 | ABostwick LakeKent | A | 8.8 ft | 19.5 µg/L | 3.3 µg/L | No recent samples | 24 ft | Not recorded |
| 2 | AEmerald LakeKent | A | 11.5 ft | 14 µg/L | 4.9 µg/L | No recent samples | No recent samples | Not recorded |
| 3 | ABig Pine Island LakeKent | A | 9.3 ft | 18.5 µg/L | 3.5 µg/L | No recent samples | 40 ft | ✓ Public |
| 4 | AMuskellunge LakeKent | A | 13.5 ft | 8.5 µg/L | 4 µg/L | No recent samples | No recent samples | ✓ Public |
| 5 | AMurray LakeKent | A | 9 ft | 12 µg/L | 2.9 µg/L | No recent samples | No recent samples | Not recorded |
| 6 | AMaston LakeKent | A | 11.3 ft | 10 µg/L | 2.4 µg/L | No recent samples | No recent samples | ✓ Public |
| 7 | AHigh LakeKent | A | 6.3 ft | 14 µg/L | 2.7 µg/L | No recent samples | No recent samples | Not recorded |
| NRBostwick LakeKent | NR | 8.8 ft | No recent samples | No recent samples | No recent samples | 24 ft | Not recorded | |
| NRScram LakeKent | NR | 12.5 ft | No recent samples | No recent samples | No recent samples | 85 ft | Not recorded | |
| NRBig Crooked LakeKent | NR | 11.5 ft | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRRound LakeKent | NR | 8 ft | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRHigh LakeKent | NR | 6.3 ft | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRNelson LakeKent | NR | 7 ft | 19 µg/L | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRMeek LakeKent | NR | 9 ft | 17 µg/L | No recent samples | No recent samples | No recent samples | Not recorded |
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 Kent 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.