East Twin Lake is a mesotrophic lake in Montmorency County, Michigan. Water quality is graded C based on 1 sampling years through 2022. Overall water quality is improving over recent sampling years. The lake supports 7 documented fish species including Johnny darter, Largemouth bass, and Mimic shiner. Public access is available with 1 public boat landing. Compared to the 5 other monitored lakes in Montmorency County, East Twin Lake ranks #6 for water quality.
Source: EPA Water Quality Portal sampling records, Michigan DNR, last sampled 2022-09-07. Grade methodology: LakeGrade methodology.
Watch East Twin Lake water quality
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Swimming Safety
Generally safe for swimming, moderate water quality
Water Quality Grade: C, Fair
Moderate clarity, visible to about 9 ft. Trophic State Index: 45.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 9 ft | C |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 45 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near East Twin Lake
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Fish Species
Click a species to see every graded lake where it is documented.
Fishing East Twin Lake
Water Quality Trend: ↑ Improving
Based on 4 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +1.62 m/yr | 4 |
| Chlorophyll-a | ↑ Improving | -0.4 µg/L/yr | 3 |
Recreation & Access
Location & Depth Map
Free interactive depth-contour map of East Twin Lake, reaching a maximum surveyed depth of 25 ft. Toggle Depth contours to overlay the bathymetric survey lines. Contour data from Michigan DNR.
County Ranking
Ranked #6 of 6 lakes in Montmorency County
Cleaner Lakes Within 30 Miles
East Twin Lake holds Grade C. 2 nearby lakes hold higher grades.
Nearby Lakes in Montmorency County
Explore East Twin Lake across LakeGrade
Fish species and top-graded lakes across Michigan
Fish species and best lakes in Montmorency 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
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Other Grade C 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
Public boat-access points from the USGS National Boat Ramps inventory
Most recent sample: 2022-09-07
Monitoring stations: 1