Diamond Lake
Osceola County, Michigan60 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.
- 60 ft max depth
- Public access
- Limited data
Diamond Lake in Osceola County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 16 ft visibility. Maximum depth: 60 ft. Surface area: 59.5 acres.
- Clarity
- 16 ft
- Max depth
- 60 ft
- Area
- 60 acres
- Public access
- Yes
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Watch Diamond Lake’s letter
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Free interactive depth-contour map of Diamond Lake, reaching a maximum surveyed depth of 60 ft. Toggle Depth contours to overlay the bathymetric survey lines. Contour data from Michigan DNR.
Why Diamond Lake has no grade
Diamond 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, Diamond Lake is Not Rated — not an F. Its 16-foot median from 8 readings collected 2021 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.
Diamond Lake is a 60-acre lake in Osceola County, Michigan with a maximum depth of 60 feet. The lake supports 25 documented fish species including Black crappie, Blacknose shiner, and Bluegill. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2021-08-21. Grade methodology: LakeQuality methodology.
What Diamond Lake is good for
From access and monitoring records, not editorial picks.
- Clear water16 ft of visibility
- Boat launch1 documented ramp
- Fishing25 species recorded
- Deep water60 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 Diamond 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 | 60 ft |
| Surface Area | 60 acres |
| Public Access | Yes |
Recreation & Access
- Diamond LakePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Diamond Lake
Graded lakes near Diamond Lake
Diamond Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Osceola County
Frequently asked questions about Diamond Lake
Where is Diamond Lake?
- Diamond Lake is a lake in Osceola 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 Diamond Lake?
- Diamond Lake in Osceola County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 16 ft visibility. Maximum depth: 60 ft. Surface area: 59.5 acres.
Is Diamond Lake safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
How deep is Diamond Lake?
- Diamond Lake has a maximum depth of 60 feet. The lake covers 59.5 acres.
What fish are in Diamond Lake?
- Fish species found in Diamond Lake include Black crappie, Blacknose shiner, Bluegill, Bluntnose minnow, Bowfin, Brook silverside, Brown bullhead, Golden shiner, Johnny darter, Largemouth bass, Longnose gar, Mimic shiner, Northern longear sunfish, Northern pike, Pumpkinseed, Rock bass, Sand shiner, Smallmouth bass, Spottail shiner, Walleye, Warmouth, Western banded killifish, White sucker, Yellow bullhead, Yellow perch. Diamond Lake is located in Osceola County, Michigan.
Are there boat ramps on Diamond Lake?
- Diamond Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Diamond Lake. Public access is listed as yes.
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Where this data comes from
8 measurements from 1 monitoring station, 2021. Retrieved from the EPA Water Quality Portal on 2026-08-26.
Collected and reported by
- North American Lake Management Society
NALMS8 samples · 2021
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
Named boat-access points from the USGS National Boat Ramps inventory