Ottawa Lake
Ottawa Lake in Monroe County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 73.7 acres.
- Area
- 74 acres
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Water clarity at Ottawa Lake
Murky water. Across summers from 2018 to 2021, Ottawa Lake averaged 0.54 m (2 ft) of visibility down into the water, so you cannot see far below the surface 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 50.45 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.
Ottawa Lake is a 74-acre lake in Monroe County, Michigan.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled recent years. Grade methodology: LakeQuality methodology.
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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 Ottawa 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 Ottawa Lake
Compare lakeside cabins, hotels, and vacation rentals near Ottawa Lake in Monroe 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 Ottawa Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 74 acres |
No bathymetric survey has been published for Ottawa Lake, so its depth is not documented here.
Fishing Ottawa Lake
Nearby Lakes in Monroe County
Frequently asked questions about Ottawa Lake
Where is Ottawa Lake?
- Ottawa Lake is a lake in Monroe 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 Ottawa Lake?
- Ottawa Lake in Monroe County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 73.7 acres.
Is Ottawa Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Ottawa Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
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Where this data comes from
Measurements for Ottawa Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.