Walnut Lake
Walnut Lake in Oakland County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Maximum depth: 46 ft. Surface area: 236.1 acres.
- Max depth
- 46 ft
- Area
- 236 acres
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Water clarity at Walnut Lake
Clear water. Across summers from 2018 to 2023, Walnut Lake averaged 4.02 m (13 ft) of visibility down into the water, so you can typically see several feet down in midsummer.
Nobody has taken a water sample here that we can find. Michigan's environmental agency measures clarity on lakes like this one from satellite images instead, which is why this page reports how clear the water is but carries no A–F grade.
Clear is not the same as clean. A lake can be easy to see through and still carry high nutrient levels, and a naturally tea-stained lake can be perfectly healthy. The A–F grade on other lakes is built from phosphorus and algae measured in a laboratory, and clarity alone cannot stand in for it.
The same satellite images put summer algae here at roughly 2.97 micrograms per litre. Estimating algae from orbit is far less exact than measuring clarity, so that figure is worth knowing and is not part of any rating.
Walnut Lake is a 236-acre lake in Oakland County, Michigan with a maximum depth of 46 feet (13-foot average).
Source: EPA Water Quality Portal sampling records, EGLE, last sampled recent years. Grade methodology: LakeQuality methodology.
Watch Walnut Lake water quality
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Swimming Safety
Not ratedElevated nutrients
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Walnut Lake
These readings exist but are not enough for an A–F grade — see why.
No clarity data. Trophic State Index: undefined.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) |
Where to stay near Walnut Lake
Compare lakeside cabins, hotels, and vacation rentals near Walnut Lake in Oakland 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 Walnut Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 46 ft |
| Average Depth | 13 ft |
| Surface Area | 236 acres |
| Shoreline Length | 1.2 mi |
Fishing Walnut Lake
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Frequently asked questions about Walnut Lake
Where is Walnut Lake?
- Walnut Lake is a lake in Oakland County, Michigan. LakeQuality has not rated this lake (UNRATED) — no in-situ water sample; this lake is rated for water clarity from satellite observations instead.
What is the water quality grade for Walnut Lake?
- Walnut Lake in Oakland County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Maximum depth: 46 ft. Surface area: 236.1 acres.
Is Walnut Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Walnut 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 Walnut Lake?
- Walnut Lake has a maximum depth of 46 feet and an average depth of 13 feet. The lake covers 236.1 acres.
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Where this data comes from
Measurements for Walnut Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.