St. Joseph County, Michigan · Water Quality Report Card
Sturgeon Lake; Center of
Sturgeon Lake; Center of in St. Joseph County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 3 ft visibility. Phosphorus: 77 µg/L.
- Clarity
- 3 ft
- Mean depth
- ~12 ft est.
- Type
- Eutrophic
Sturgeon Lake; Center of is a productive, nutrient-rich eutrophic lake in St. Joseph County, Michigan with an estimated average depth of about 12 feet.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2023-09-25. Grade methodology: LakeGrade methodology.
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Swimming Safety
Not rated for swimming — there is not enough monitoring data to judge this lake
Water Quality Grade: Not rated
Very murky, less than 3 ft of visibility. Phosphorus level: 77 µg/L. Trophic State Index: 64.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3 ft | |
| Phosphorus | 77 µg/L | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 64 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Average Depth | ~12 ft est. |
Depth marked “est.” is a modeled estimate from HydroLAKES, not a measured survey. Michigan has not published bathymetry for Sturgeon Lake; Center of.
Where to stay near Sturgeon Lake; Center of
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Fishing Sturgeon Lake; Center of
Location
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EPA Impairment Status
Sturgeon Lake; Center of 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 MI040500010406-03 · Official waterbody report · Matched by proximity (0.43 km)
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
Where this data comes from
12 measurements from 1 monitoring station, 2023. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Michigan EGLE - MiCorps
21MICH_MICORPS12 samples · 2023
Analytical methods
- Phosphorus by Colorimetry
Monitoring station identifiers (1)
Grade thresholds come from the U.S. EPA National Lakes Assessment 2022 Technical Support Document (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated.
Data Sources
Water quality data from the EPA Water Quality Portal
Impairment status from EPA ATTAINS 303(d) database
Lake size & watershed from HydroLAKES (HydroSHEDS)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion
Most recent sample: 2023-09-25
Monitoring stations: 1