Long Lake is a mesotrophic lake in Barry County, Michigan. Water quality is graded B based on 1 sampling years through 2022. Water clarity is improving over recent sampling years. The lake supports 1 documented fish species including Lake herring. Public access is available with 1 public boat landing. Compared to the 13 other monitored lakes in Barry County, Long Lake ranks #10 for water quality.
Source: EPA Water Quality Portal sampling records, Michigan DNR, last sampled 2022-09-15. Grade methodology: LakeGrade methodology.
Watch Long Lake water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
Good clarity, visible to about 11 ft. Trophic State Index: 43.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 11 ft | B |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 43 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Long Lake
Compare lakeside cabins, hotels, and vacation rentals near Long 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.
Top-rated places to stay near Long Lake
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a trip to Long Lake?
Get lake water-quality report cards plus the best cabin & lodging deals near Long Lake — straight to your inbox. No spam, unsubscribe anytime.
Planning a whole trip? See where to stay at Michigan’s top lakes →
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Long Lake
Water Quality Trend: → Stable
Based on 3 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +1.81 m/yr | 3 |
| Chlorophyll-a | ↓ Declining | +0.5 µg/L/yr | 3 |
Recreation & Access
Location
County Ranking
Ranked #10 of 14 lakes in Barry County
Cleaner Lakes Within 30 Miles
Long Lake holds Grade B. One nearby lake has a higher grade.
Nearby Lakes in Barry County
Explore Long Lake across LakeGrade
Fish species and top-graded lakes across Michigan
Fish species and best lakes in Barry 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
Michigan's cleanest and most-polluted lakes, ranked
More Michigan Lake Rankings
Other Grade B Lakes in Michigan
Kalamazoo County · Clarity: 12.5 ft
Kalamazoo County · Clarity: 7.2 ft
Kalamazoo County · Clarity: 7 ft
Allegan County · Clarity: 9 ft
Allegan County · Clarity: 10.5 ft
Kalamazoo County · Clarity: 9.5 ft
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: 2022-09-15
Monitoring stations: 1