Stony Lake West Basin North is a mesotrophic lake in Oceana County, Michigan. Water quality is graded C based on 2 sampling years through 2023. Overall water quality is improving over recent sampling years. Compared to the 4 other monitored lakes in Oceana County, Stony Lake West Basin North ranks #3 for water quality.
Source: EPA Water Quality Portal sampling records, Michigan DNR, last sampled 2023-09-16. Grade methodology: LakeGrade methodology.
Watch Stony Lake West Basin North water quality
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Swimming Safety
Generally safe for swimming, moderate water quality
Water Quality Grade: C, Fair
Murky, only visible to about 6.5 ft. Chlorophyll-a: 6.3 µg/L. Trophic State Index: 49.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 6.5 ft | D |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | 6.3 µg/L | B |
| Trophic State Index (TSI) | 49 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Stony Lake West Basin North
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Fishing Stony Lake West Basin North
Water Quality Trend: ↑ Improving
Based on 3 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +2.755 m/yr | 3 |
| Chlorophyll-a | ↑ Improving | -0.8 µg/L/yr | 3 |
Water Temperature
Stony Lake West Basin North averages about 58°F at the surface in summer, usually warmest in Jul (about 59°F) and coldest in May (about 52°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 1,029 field readings (2012–2023) via the EPA Water Quality Portal. See the full Stony Lake West Basin North water temperature breakdown →
Location
County Ranking
Ranked #3 of 5 lakes in Oceana County
Cleaner Lakes Within 30 Miles
Stony Lake West Basin North holds Grade C. 2 nearby lakes hold higher grades.
- BWhite Lake Middle Basin; Fruitland TownshipMuskegon County · 13.4 mi · Higher grade (C → B)
- BPentwater Lake Northwest Basin; Pentwater TownshipOceana County · 14.9 mi · Higher grade (C → B)
Nearby Lakes in Oceana County
Explore Stony Lake West Basin North across LakeGrade
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Fish species and best lakes in Oceana 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 C Lakes in Michigan
Muskegon County · Clarity: 6.8 ft
Muskegon County · Clarity: 8.5 ft
Mason County · Clarity: 6.5 ft
Lake County · Clarity: 8 ft
Newaygo County · Clarity: 4.5 ft
Ottawa County · Clarity: 4 ft
Mesotrophic Lakes in Michigan
More records, surveys & data sources
EPA Impairment Status
Stony Lake West Basin North is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit MI040601011006-01 · Official waterbody report · Matched by proximity (0.3 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: 2023-09-16
Monitoring stations: 1