Flint Park Lake is a productive, nutrient-rich eutrophic lake in Genesee County, Michigan. Water quality is graded C based on 2 sampling years through 2022. Overall water quality is improving over recent sampling years. Compared to the 8 other monitored lakes in Genesee County, Flint Park Lake ranks #6 for water quality.
Source: EPA Water Quality Portal sampling records, Michigan DNR, last sampled 2022-09-17. Grade methodology: LakeGrade methodology.
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Swimming Safety
Generally safe for swimming, moderate water quality
Water Quality Grade: C, Fair
Murky, only visible to about 3.8 ft. Chlorophyll-a: 12 µg/L. Trophic State Index: 57.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.8 ft | D |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | 12 µg/L | C |
| Trophic State Index (TSI) | 57 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Flint Park Lake
Compare lakeside cabins, hotels, and vacation rentals near Flint Park Lake in Genesee County, Michigan — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
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Fishing Flint Park Lake
Water Quality Trend: ↑ Improving
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +1.51 m/yr | 2 |
Water Temperature
Flint Park Lake averages about 68°F at the surface in summer, usually warmest in Aug (about 73°F) and coldest in Jun (about 59°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 44 field readings (2022–2022) via the EPA Water Quality Portal. See the full Flint Park Lake water temperature breakdown →
Location
County Ranking
Ranked #6 of 9 lakes in Genesee County
Nearby Lakes in Genesee County
Explore Flint Park Lake across LakeGrade
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Species activity outlook by water temperature and season
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High nutrients, frequent algae, reduced clarity
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More records, surveys & data sources
EPA Impairment Status
Flint Park Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit MI040802040503-02 · Official waterbody report
Regulated Pollution Sources Nearby
7 EPA-permitted facilities operate within about 5 miles of Flint Park Lake under Clean Water Act (NPDES) discharge permits. 3 facilities have a reported Clean Water Act violation in the past three years.
- Gm-Powertrain Flint NorthFlint · 2.2 mi away · NPDES MI0001597Recent violation
- Mount Morris MS4-GeneseeMount Morris · 4.3 mi away · NPDES MI0060101Recent violation
- Mount Morris Ps MS4-GeneseeMount Morris · 4.8 mi away · NPDES MI0060361Recent violation
- Gm Powertrain-Flint NorthFlint · 1.8 mi away · NPDES MI0057397
- Racer Trust-Coldwater Road FacilityMount Morris · 3.4 mi away · NPDES MI0060329
- Itw Tacc Polyurethane CenterLapeer · 4.7 mi away · NPDES MIG250076
Facilities permitted to discharge under the Clean Water Act within ~5 miles; proximity does not by itself mean a facility affects this lake. Source: EPA ECHO (ICIS-NPDES), as of 2026-07.
Data Sources
Water quality data from the EPA Water Quality Portal
Impairment status from EPA ATTAINS 303(d) database
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Grading methodology based on Metropolitan Council standards
Most recent sample: 2022-09-17
Monitoring stations: 1