Stone Lake
Cass County, Michigan157 acresView mapDirections
Not Rated: one monitoring station are on record, but they measured water clarity only. LakeQuality’s A–F method grades total phosphorus, total nitrogen, chlorophyll-a, and turbidity; clarity is shown, not scored.
- 50 ft max depth
- Public access
- Limited data
Stone Lake in Cass County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 16 ft visibility. Maximum depth: 50 ft. Surface area: 156.8 acres.
- Clarity
- 16 ft
- Max depth
- 50 ft
- Area
- 157 acres
- Public access
- Yes
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Watch Stone Lake’s letter
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Free interactive depth-contour map of Stone Lake, reaching a maximum surveyed depth of 50 ft. Toggle Depth contours to overlay the bathymetric survey lines. Contour data from Michigan DNR.
Why Stone Lake has no grade
Stone Lake has monitoring on record from one station, but only water clarity was measured. LakeQuality’s A–F letter uses total phosphorus, total nitrogen, chlorophyll-a, and turbidity against EPA National Lakes Assessment condition classes. With none of those grading measurements on record, Stone Lake is Not Rated — not an F. Its 16-foot median from 7 readings collected 2023 is still shown as clarity, but clarity alone cannot earn a letter.
Not Rated is EPA Integrated Reporting Category 3 — insufficient information. 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.
Stone Lake is a 157-acre lake in Cass County, Michigan with a maximum depth of 50 feet. The lake supports 2 documented fish species including Bluegill and Redear sunfish. Public access is available.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2023-09-01. Grade methodology: LakeQuality methodology.
What Stone Lake is good for
From access and monitoring records, not editorial picks.
- Clear water16 ft of visibility
- Deep water50 ft surveyed max depth
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Check local advisories before you swim.
Water quality measurements for Stone Lake
These readings exist but are not enough for an A–F grade — see why.
Crystal clear, you can see 16 ft down. TSI 37.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 16 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 37 | Oligotrophic |
Low nutrients, clear water. The letter is not a swimming clearance.
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 50 ft |
| Surface Area | 157 acres |
| Public Access | Yes |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Stone Lake
Graded lakes near Stone Lake
Stone Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Cass County
Frequently asked questions about Stone Lake
Where is Stone Lake?
- Stone Lake is a lake in Cass 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 Stone Lake?
- Stone Lake in Cass County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 16 ft visibility. Maximum depth: 50 ft. Surface area: 156.8 acres.
Is Stone Lake safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
How deep is Stone Lake?
- Stone Lake has a maximum depth of 50 feet. The lake covers 156.8 acres.
What fish are in Stone Lake?
- Fish species found in Stone Lake include Bluegill, Redear sunfish. Stone Lake is located in Cass County, Michigan.
Explore Stone Lake across LakeQuality
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Where this data comes from
7 measurements from 1 monitoring station, 2023. Retrieved from the EPA Water Quality Portal on 2026-08-26.
Collected and reported by
- Michigan EGLE - MiCorps
21MICH_MICORPS7 samples · 2023
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
Lake size & watershed from HydroLAKES (HydroSHEDS)