Flint Park Lake
Genesee County, Michigan16 acresView mapDirections
Nutrients and algae sit mid-range for this region.
- Eutrophic
- Impaired · PFAS
- #1 of 2 in the county
- Limited data
Flint Park Lake in Genesee County, Michigan has a water quality grade of C (Fair). Water clarity: 3.8 ft visibility. Phosphorus: 87.5 µg/L. Chlorophyll-a (algae): 12 µg/L. Surface area: 15.7 acres.
- Clarity
- 3.8 ft
- Typical in September
- 72°F
- Area
- 16 acres
- Type
- Eutrophic
- Phosphorus
- 87.5 µg/L
- Chlorophyll-a
- 12 µg/L
- Trend
- ↑ Improving
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Watch Flint Park Lake’s letter
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Flint Park Lake is a 16-acre productive, nutrient-rich eutrophic lake in Genesee County, Michigan. Water quality is graded C based on 1 sampling years through 2022. Overall water quality is improving over recent sampling years. Compared to the 1 other monitored lakes in Genesee County, Flint Park Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2022-09-17. Grade methodology: LakeQuality methodology.
Swimming Safety
Grade onlyLimited data
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
The C is nutrients and algae, not a swimming clearance. Flint Park Lake is listed impaired under Clean Water Act §303(d) (IR 5) for pFAS. Check local advisories before you swim.
Water Quality Grade: C (Fair)
Murky, only visible to about 3.8 ft. Phosphorus 87.5 µg/L. Chlorophyll-a 12 µg/L. TSI 61. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.8 ft | Not graded |
| Phosphorus | 87.5 µg/L | Not graded |
| Chlorophyll-a (Algae) | 12 µg/L | Fair |
| Trophic State Index (TSI) | 61 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Water Temperature
Flint Park Lake typically sits around 72°F at the surface in September. Summer average is about 68°F. 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 →
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 16 acres |
No bathymetric survey has been published for Flint Park Lake, so its depth is not documented here.
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 |
| Phosphorus | ↑ Improving | -65 µg/L/yr | 2 |
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.
County Ranking
Ranked #1 of 2 lakes in Genesee County
Nearby Lakes in Genesee County
Frequently asked questions about Flint Park Lake
Where is Flint Park Lake?
- Flint Park Lake is a lake in Genesee County, Michigan. LakeQuality grades it C for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Flint Park Lake?
- Flint Park Lake in Genesee County, Michigan has a water quality grade of C (Fair). Water clarity: 3.8 ft visibility. Phosphorus: 87.5 µg/L. Chlorophyll-a (algae): 12 µg/L. Surface area: 15.7 acres.
Is Flint Park Lake safe to swim in?
- The C is nutrients and algae, not a swimming clearance. Flint Park Lake is listed impaired under Clean Water Act §303(d) (IR 5) for pFAS. Check local advisories before you swim.
What is the water temperature of Flint Park Lake?
- Flint Park Lake typically sits around 72°F at the surface in September, from 44 EPA Water Quality Portal field readings (2022–2022). That is a typical value for the month, not a live reading.
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Where this data comes from
24 measurements from 1 monitoring station, 2021–2022. Retrieved from the EPA Water Quality Portal on 2026-08-26.
Collected and reported by
- Michigan EGLE - MiCorps
21MICH_MICORPS24 samples · 2021–2022
Analytical methods
- Phosphorus by Colorimetry
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
Monitoring station identifiers (1)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database
Regulated discharger data from EPA ECHO (ICIS-NPDES)