Flint Park Lake is a productive, nutrient-rich eutrophic lake in Genesee County, Michigan. Water quality is graded D based on 1 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 #8 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
Swimming not recommended, poor water quality with high algae risk
Water Quality Grade: D, Poor
Murky, only visible to about 3.8 ft. Trophic State Index: 58.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.8 ft | D |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 58 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Flint Park Lake
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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 |
Location
County Ranking
Ranked #8 of 9 lakes in Genesee County
Cleaner Lakes Within 30 Miles
Flint Park Lake holds Grade D. 2 nearby lakes hold higher grades.
Nearby Lakes in Genesee County
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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
5 EPA-permitted facilities operate within about 5 miles of Flint Park Lake under Clean Water Act (NPDES) discharge permits, including 1 classified by the EPA as major discharger. 5 facilities have a reported Clean Water Act violation in the past three years.
- Flint WwtpFlint · 2.9 mi away · NPDES MI0022926MajorRecent violation
- Westwood Heights Ps MS4-GeneseeFlint · 1.6 mi away · NPDES MI0060348Recent violation
- Mount Morris Twp MS4-GeneseeMount Morris · 2.3 mi away · NPDES MI0060102Recent violation
- Carman-Ainsworth Ps MS4-GeneseeFlint · 3.9 mi away · NPDES MI0060358Recent violation
- Flint Twp MS4-GeneseeFlint · 5 mi away · NPDES MI0060096Recent violation
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