Diamond Lake
Diamond Lake in Newaygo County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 12.3 ft visibility. Maximum depth: 25 ft. Surface area: 188.3 acres.
- Clarity
- 12.3 ft
- Max depth
- 25 ft
- Area
- 188 acres
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Why Diamond 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 Diamond 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.
Diamond Lake is a 188-acre lake in Newaygo County, Michigan with a maximum depth of 25 feet. The lake supports 25 documented fish species including Black crappie, Blacknose shiner, and Bluegill.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2019-09-12. 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 Diamond Lake
These readings exist but are not enough for an A–F grade — see why.
Good clarity, visible to about 12.3 ft. Trophic State Index: 41.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 12.3 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 41 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Diamond Lake
Compare lakeside cabins, hotels, and vacation rentals near Diamond Lake in Newaygo 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.
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Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 25 ft |
| Surface Area | 188 acres |
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 Newaygo County
Frequently asked questions about Diamond Lake
Where is Diamond Lake?
- Diamond Lake is a lake in Newaygo County, Michigan. LakeQuality has not rated this lake (UNRATED) — there is not enough recent sampling to assign a letter.
What is the water quality grade for Diamond Lake?
- Diamond Lake in Newaygo County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 12.3 ft visibility. Maximum depth: 25 ft. Surface area: 188.3 acres.
Is Diamond Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Diamond Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
How deep is Diamond Lake?
- Diamond Lake has a maximum depth of 25 feet. The lake covers 188.3 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 Newaygo County, Michigan.
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Where this data comes from
9 measurements from 1 monitoring station, 2019. Retrieved from the EPA Water Quality Portal on 2026-08-26.
Collected and reported by
- North American Lake Management Society
NALMS9 samples · 2019
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.