Cobb Lake
Barry County, Michigan92 acresView mapDirections
EGLE publishes the water-quality measurements for Cobb Lake. Here is what has been measured.
- Limited data
Cobb Lake in Barry County, Michigan has water-quality measurements published by EGLE, shown here as reported. Water clarity: 14.5 ft visibility. Surface area: 92.3 acres.
Cobb Lake is a 92-acre lake in Barry County, Michigan. Overall water quality is improving over recent sampling years.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2022-09-22. Methodology: how these readings are compared.
What Cobb Lake is good for
From access and monitoring records, not editorial picks.
- Clear water14.5 ft of visibility
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Cobb Lake is safe to swim in today is a call for the Michigan Department of Environment, Great Lakes, and Energy (EGLE) and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Cobb Lake
These are the measurements EGLE publishes for Cobb Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Good clarity, visible to about 14.5 ft. TSI 39.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 14.5ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | No reading The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. | |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 39 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
Ask about Cobb Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
92 acres
No bathymetric survey has been published for Cobb Lake, so its depth is not documented here.
Stays via Stay22
Stays near Cobb Lake
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Fishing Cobb Lake
Water Quality Trend: Improving
Based on 8 years of monitoring (2016–2023).
Water clarity
Improving8 years
Phosphorus
Stable-0.08 µg/L/yr7 years
Chlorophyll-a
Stable+0.01 µg/L/yr6 years
Nearby Lakes in Barry County
Frequently asked questions about Cobb Lake
Where is Cobb Lake?
- Cobb Lake is a lake in Barry County, Michigan. Its water-quality measurements are published by EGLE and shown on this page as reported.
What is the water quality of Cobb Lake?
- Cobb Lake in Barry County, Michigan has water-quality measurements published by EGLE, shown here as reported. Water clarity: 14.5 ft visibility. Surface area: 92.3 acres.
Is Cobb Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
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Where this data comes from
93 measurements from 1 monitoring station, 2016–2022. Retrieved from the EPA Water Quality Portal on 2026-08-26.
Collected and reported by
- North American Lake Management Society
NALMS93 samples · 2016–2022
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.