Gull Lake is a 2,050-acre mesotrophic lake in Kalamazoo County, Michigan. Water quality is graded B based on 1 sampling years through 2022. Overall water quality is improving over recent sampling years. Limited fish-species data available. Public access is available. Compared to the 11 other monitored lakes in Kalamazoo County, Gull Lake ranks #3 for water quality.
Source: EPA Water Quality Portal sampling records, Michigan DNR, last sampled 2022-09-17. Grade methodology: LakeGrade methodology.
Watch Gull Lake 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 12.5 ft. Trophic State Index: 41.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 12.5 ft | B |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 41 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 2,050 acres |
| Public Access | Yes |
Where to stay near Gull Lake
Compare lakeside cabins, hotels, and vacation rentals near Gull Lake in Kalamazoo 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 Gull Lake
Water Quality Trend: ↑ Improving
Based on 4 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +1.546 m/yr | 4 |
| Chlorophyll-a | ↑ Improving | -0.3 µg/L/yr | 3 |
Location & Depth Map
Free interactive depth-contour map of Gull Lake, reaching a maximum surveyed depth of 110 ft. Toggle Depth contours to overlay the bathymetric survey lines. Contour data from Michigan DNR.
County Ranking
Ranked #3 of 12 lakes in Kalamazoo County
Cleaner Lakes Within 30 Miles
Gull Lake holds Grade B. One nearby lake has a higher grade.
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Moderate nutrients, good water quality
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More records, surveys & data sources
Reservoir Info (USACE NID)
Gull Lake is a man-made reservoir impounded by the Gull Lake Dam (completed 1920), built primarily for recreation on the Gull Lake Outlet; earth-type dam, 21 ft tall and 260 ft long.
- Surface area
- 2,050 ac
- Normal storage
- 0 ac-ft
- Max storage
- 5,393 ac-ft
- Drainage area
- 29 sq mi
- Hazard class
- Low
- Owner
- Gull Lake Association
Source: USACE National Inventory of Dams, NID ID MI00565 · Operator website
EPA Impairment Status
Gull Lake 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 MI040500030507-04 · Official waterbody report
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
Most recent sample: 2022-09-17
Monitoring stations: 1