Cool Lake
Cool Lake in Lake County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 19.5 ft visibility. Maximum depth: 43 ft. Surface area: 78.5 acres.
- Clarity
- 19.5 ft
- Max depth
- 43 ft
- Area
- 79 acres
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Why Cool 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 Cool 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.
Cool Lake is a 79-acre lake in Lake County, Michigan with a maximum depth of 43 feet. The lake supports 10 documented fish species including Blackchin shiner, Blacknose shiner, and Bluntnose minnow.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2017-08-20. 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 Cool Lake
These readings exist but are not enough for an A–F grade — see why.
Crystal clear, you can see 19.5 ft down. Trophic State Index: 34.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 19.5 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 34 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Where to stay near Cool Lake
Compare lakeside cabins, hotels, and vacation rentals near Cool Lake in Lake 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 Cool Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 43 ft |
| Surface Area | 79 acres |
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 Cool Lake
Graded lakes near Cool Lake
Cool Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Lake County
Frequently asked questions about Cool Lake
Where is Cool Lake?
- Cool Lake is a lake in Lake 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 Cool Lake?
- Cool Lake in Lake County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 19.5 ft visibility. Maximum depth: 43 ft. Surface area: 78.5 acres.
Is Cool Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Cool 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 Cool Lake?
- Cool Lake has a maximum depth of 43 feet. The lake covers 78.5 acres.
What fish are in Cool Lake?
- Fish species found in Cool Lake include Blackchin shiner, Blacknose shiner, Bluntnose minnow, Brook stickleback, Central mudminnow, Iowa darter, Mottled sculpin, Rock bass, Yellow bullhead, Yellow perch. Cool Lake is located in Lake County, Michigan.
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Where this data comes from
9 measurements from 1 monitoring station, 2017. Retrieved from the EPA Water Quality Portal on 2026-08-26.
Collected and reported by
- North American Lake Management Society
NALMS9 samples · 2017
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)