Rennie Lake; Central Basin; East Bay Township is a mesotrophic lake in Grand Traverse County, Michigan. Water quality is graded A based on 2 sampling years through 2023. Water clarity is improving over recent sampling years. The lake supports 9 documented fish species including Bluegill, Bluntnose minnow, and Brown bullhead. Compared to the 19 other monitored lakes in Grand Traverse County, Rennie Lake; Central Basin; East Bay Township ranks #15 for water quality.
Source: EPA Water Quality Portal sampling records, Michigan DNR, last sampled 2023-09-10. Grade methodology: LakeGrade methodology.
Watch Rennie Lake; Central Basin; East Bay Township water quality
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Swimming Safety
Excellent for swimming, crystal clear water with minimal algae
Water Quality Grade: A, Excellent
Good clarity, visible to about 13 ft. Chlorophyll-a: 3.7 µg/L. Trophic State Index: 42.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 13 ft | B |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | 3.7 µg/L | A |
| Trophic State Index (TSI) | 42 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Rennie Lake; Central Basin; East Bay Township
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Fish Species
Click a species to see every graded lake where it is documented.
Fishing Rennie Lake; Central Basin; East Bay Township
- → Rennie Lake; Central Basin; East Bay Township fishing forecast & best times (species outlook + 14-day solunar calendar)
- → Rennie Lake; Central Basin; East Bay Township fishing regulations (limits, seasons, special rules)
- → Is it safe to eat fish from Rennie Lake; Central Basin; East Bay Township? (mercury & PFAS guide)
Water Quality Trend: → Stable
Based on 4 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +1.703 m/yr | 4 |
| Chlorophyll-a | ↓ Declining | +0.15 µg/L/yr | 3 |
Water Temperature
Rennie Lake; Central Basin; East Bay Township averages about 72°F at the surface in summer, usually warmest in Aug (about 75°F) and coldest in May (about 56°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 117 field readings (2021–2021) via the EPA Water Quality Portal. See the full Rennie Lake; Central Basin; East Bay Township water temperature breakdown →
Location
County Ranking
Ranked #15 of 20 lakes in Grand Traverse County
Nearby Lakes in Grand Traverse County
Explore Rennie Lake; Central Basin; East Bay Township across LakeGrade
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Fish species and best lakes in Grand Traverse County
Species activity outlook by water temperature and season
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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 A Lakes in Michigan
Mesotrophic Lakes in Michigan
More records, surveys & data sources
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
Lake size & watershed from HydroLAKES (HydroSHEDS)
Grading methodology based on Metropolitan Council standards
Most recent sample: 2023-09-10
Monitoring stations: 1