Genesee County Lake Quality
Michigan, 7 lakes, average grade C (Fair)
Genesee County has 7 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. Genesee County averages to a C. The distribution behind that average matters more than the letter: a few stressed lakes versus many decent ones can produce the same average as the inverse.
A meaningful share of Genesee'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 Flint Park Lake (C).
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Quick Answers for Genesee County
Planning a trip? Check special fishing regulations for Flint Park Lake — or check the official Michigan fishing regulations.
Fishing in Genesee County
All Lakes in Genesee County
7 lakes · 1 graded, 6 not rated1 graded lake · 6 not rated, hidden
| # | Lake | Grade | Clarity | Phosphorus | Algae | Trophic | Max Depth | Access |
|---|---|---|---|---|---|---|---|---|
| 1 | CFlint Park LakeGenesee | C | 3.8 ft | 87.5 µg/L | 12 µg/L | No recent samples | No recent samples | Not recorded |
| NRByram Lake Central Basin; Fenton TownshipGenesee | NR | 16 ft | No recent samples | No recent samples | No recent samples | 50 ft | Not recorded | |
| NRLake FentonGenesee | NR | 17.5 ft | No recent samples | No recent samples | No recent samples | 90 ft | ✓ Public | |
| NRSilver LakeGenesee | NR | 12 ft | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRThread LakeGenesee | NR | 1.8 ft | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRFlint Park LakeGenesee | NR | 3.8 ft | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRLobdell Lake West Basin; Argentine TownshipGenesee | NR | 9 ft | 13 µg/L | No recent samples | No recent samples | 70 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 Genesee 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.