Long Lake Central Basin is a mesotrophic lake in Oakland County, Michigan. Water quality is graded B based on 1 sampling years through 2023. Overall water quality is improving over recent sampling years. Limited fish-species data available. Public access is available with 1 public boat landing. Compared to the 44 other monitored lakes in Oakland County, Long Lake Central Basin ranks #10 for water quality.
Source: EPA Water Quality Portal sampling records, Michigan DNR, last sampled 2023-09-12. Grade methodology: LakeGrade methodology.
Watch Long Lake Central Basin water quality
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Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
Good clarity, visible to about 13 ft. Trophic State Index: 40.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 13 ft | B |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 40 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Long Lake Central Basin
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Fishing Long Lake Central Basin
Water Quality Trend: ↑ Improving
Based on 4 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +1.635 m/yr | 4 |
| Chlorophyll-a | ↑ Improving | -0.4 µg/L/yr | 3 |
Recreation & Access
Location
County Ranking
Ranked #10 of 45 lakes in Oakland County
Nearby Lakes in Oakland County
Explore Long Lake Central Basin across LakeGrade
Fish species and top-graded lakes across Michigan
Fish species and best lakes in Oakland County
Species activity outlook by water temperature and season
Where to stay at Michigan's top lakes, each with its grade
Moderate nutrients, good water quality
Michigan's cleanest and most-polluted lakes, ranked
More Michigan Lake Rankings
Other Grade B Lakes in Michigan
Lapeer County · Clarity: 14 ft
Genesee County · Clarity: 12 ft
Genesee County · Clarity: 12 ft
Genesee County · Clarity: 10 ft
Genesee County · Clarity: 10 ft
Livingston County · Clarity: 12 ft
Mesotrophic Lakes in Michigan
More records, surveys & data sources
EPA Impairment Status
Long Lake Central Basin is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit MI040900030105-05 · Official waterbody report · Matched by proximity (1.23 km)
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth is a modeled estimate.
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)
Grading methodology based on Metropolitan Council standards
Public boat-access points from the USGS National Boat Ramps inventory
Most recent sample: 2023-09-12
Monitoring stations: 1