Leelanau County, Michigan · Water Quality Report Card
Lake Leelanau; South Basin; Center of
Lake Leelanau; South Basin; Center of in Leelanau County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 11.8 ft visibility.
- Clarity
- 11.8 ft
- Mean depth
- ~23 ft est.
- Type
- Mesotrophic
Lake Leelanau; South Basin; Center of is a mesotrophic lake in Leelanau County, Michigan with an estimated average depth of about 23 feet.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2021-09-19. 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
Good clarity, visible to about 11.8 ft. Trophic State Index: 42.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 11.8 ft | |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 42 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Average Depth | ~23 ft est. |
Depth marked “est.” is a modeled estimate from HydroLAKES, not a measured survey. Michigan has not published bathymetry for Lake Leelanau; South Basin; Center of.
Where to stay near Lake Leelanau; South Basin; Center of
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Fishing Lake Leelanau; South Basin; Center of
Location
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Moderate nutrients, good water quality
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Planning a trip around Sleeping Bear Dunes?
Lake Leelanau; South Basin; Center of is about 16 miles from Sleeping Bear Dunes National Lakeshore. Crowds there swing hard by season, so the month you pick changes both how busy the park is and what lodging costs.
Best time to visit Sleeping Bear Dunes →More Michigan Lake Rankings
Other Lakes in Michigan
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More records, surveys & data sources
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, 2021. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Michigan EGLE - MiCorps
21MICH_MICORPS12 samples · 2021
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
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: 2021-09-19
Monitoring stations: 1