Cobb Lake is a cold, clear oligotrophic lake in Barry County, Michigan. Water quality is graded A based on 1 sampling years through 2022. Compared to the 13 other monitored lakes in Barry County, Cobb Lake ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, Michigan DNR, last sampled 2022-09-22. Grade methodology: LakeGrade methodology.
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Swimming Safety
Excellent for swimming, crystal clear water with minimal algae
Water Quality Grade: A, Excellent
Crystal clear, you can see 16 ft down. Trophic State Index: 37.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 16 ft | A |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 37 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Where to stay near Cobb Lake
Compare lakeside cabins, hotels, and vacation rentals near Cobb Lake in Barry County, Michigan — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
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Fishing Cobb Lake
Water Quality Trend: → Stable
Based on 4 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | -0.175 m/yr | 4 |
Location
County Ranking
Ranked #2 of 14 lakes in Barry County
Nearby Lakes in Barry County
Explore Cobb Lake across LakeGrade
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Low nutrients, clear water, excellent for swimming
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More Michigan Lake Rankings
Other Grade A Lakes in Michigan
Allegan County · Clarity: 14 ft
Van Buren County · Clarity: 13 ft
Van Buren County · Clarity: 17 ft
Van Buren County · Clarity: 15 ft
St. Joseph County · Clarity: 10.5 ft
Montcalm County · Clarity: 16 ft
Oligotrophic 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: 2022-09-22
Monitoring stations: 1