Stony Lake
Stony Lake in Oceana County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 6.5 ft visibility. Maximum depth: 43 ft. Surface area: 270.2 acres.
- Clarity
- 6.5 ft
- Typical in August
- 66°F
- Max depth
- 43 ft
- Area
- 270 acres
- Trend
- ↑ Improving
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Free interactive depth-contour map of Stony Lake, reaching a maximum surveyed depth of 43 ft. Toggle Depth contours to overlay the bathymetric survey lines. Contour data from Michigan DNR.
Why Stony Lake has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Stony Lake, the only measurement available is water clarity, which is not a water-quality indicator on its own — EPA's National Lakes Assessment does not grade clarity. Sampling here has recorded water clarity, but not phosphorus and algae (chlorophyll-a).
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by EGLE and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Stony Lake is a 270-acre lake in Oceana County, Michigan with a maximum depth of 43 feet. Overall water quality is improving over recent sampling years.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2022-09-15. Grade methodology: LakeQuality methodology.
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Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Stony Lake
These readings exist but are not enough for an A–F grade — see why.
Murky, only visible to about 6.5 ft. Trophic State Index: 50.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 6.5 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 50 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Stony Lake
Compare lakeside cabins, hotels, and vacation rentals near Stony Lake in Oceana 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 Stony Lake
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Water Temperature
Stony Lake typically sits around 66°F at the surface in August. Summer average is about 64°F. Usually warmest in Aug (about 66°F) and coldest in May (about 56°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 410 field readings (2012–2018) via the EPA Water Quality Portal. See the full Stony Lake water temperature breakdown →
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 43 ft |
| Surface Area | 270 acres |
Fishing Stony Lake
Water Quality Trend: ↑ Improving
Based on 7 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.372 m/yr | 7 |
| Phosphorus | ↑ Improving | -0.41 µg/L/yr | 7 |
| Chlorophyll-a | ↑ Improving | -0.26 µg/L/yr | 7 |
EPA Impairment Status
Stony Lake 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
Graded lakes near Stony Lake
Stony Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Oceana County
Frequently asked questions about Stony Lake
Where is Stony Lake?
- Stony Lake is a lake in Oceana County, Michigan. LakeQuality has not rated this lake (UNRATED) — the only measurement available is water clarity, which is not a water-quality indicator on its own — EPA's National Lakes Assessment does not grade clarity.
What is the water quality grade for Stony Lake?
- Stony Lake in Oceana County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 6.5 ft visibility. Maximum depth: 43 ft. Surface area: 270.2 acres.
Is Stony Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Stony Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
What is the water temperature of Stony Lake?
- Stony Lake typically sits around 66°F at the surface in August, from 410 EPA Water Quality Portal field readings (2012–2018). That is a typical value for the month, not a live reading.
How deep is Stony Lake?
- Stony Lake has a maximum depth of 43 feet. The lake covers 270.2 acres.
Explore Stony Lake across LakeQuality
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Where this data comes from
90 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
NALMS90 samples · 2016–2022
Monitoring station identifiers (1)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database