Sylvan Lake West Central Basin; Brooks Township is a mesotrophic lake in Newaygo County, Michigan. Water quality is graded B based on 1 sampling years through 2023. Overall water quality is improving over recent sampling years. Compared to the 16 other monitored lakes in Newaygo County, Sylvan Lake West Central Basin; Brooks Township ranks #10 for water quality.
Source: EPA Water Quality Portal sampling records, Michigan DNR, last sampled 2023-08-24. Grade methodology: LakeGrade methodology.
Watch Sylvan Lake West Central Basin; Brooks Township 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 12.8 ft. Trophic State Index: 40.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 12.8 ft | B |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 40 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Sylvan Lake West Central Basin; Brooks Township
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Fishing Sylvan Lake West Central Basin; Brooks Township
Water Quality Trend: ↑ Improving
Based on 3 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +1.75 m/yr | 3 |
Location & Depth Map
Free interactive depth-contour map of Sylvan Lake West Central Basin; Brooks Township, reaching a maximum surveyed depth of 63 ft. Toggle Depth contours to overlay the bathymetric survey lines. Contour data from Michigan DNR.
County Ranking
Ranked #10 of 17 lakes in Newaygo County
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Moderate nutrients, good water quality
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Other Grade B Lakes in Michigan
Montcalm County · Clarity: 11 ft
Montcalm County · Clarity: 10.8 ft
Montcalm County · Clarity: 11 ft
Mecosta County · Clarity: 11.5 ft
Lake County · Clarity: 8 ft
Kent County · Clarity: 14.5 ft
Mesotrophic Lakes in Michigan
More records, surveys & data sources
EPA Impairment Status
Sylvan Lake West Central Basin; Brooks Township is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit MI040601020903-04 · Official waterbody report · Matched by proximity (0.05 km)
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: 2023-08-24
Monitoring stations: 1