Greenwood Reservoir
Greenwood Reservoir in Marquette County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Maximum depth: 51 ft. Surface area: 1073.8 acres.
- Max depth
- 51 ft
- Area
- 1,074 acres
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Water clarity at Greenwood Reservoir
Moderate clarity. Across summers from 2018 to 2023, Greenwood Reservoir averaged 1.74 m (6 ft) of visibility down into the water, so visibility is middling in midsummer, which is ordinary for a productive inland lake. This lake sits close to the line between clarity classes, so treat the label as approximate and the depth reading as the real number.
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 5.19 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.
Greenwood Reservoir is a 1,074-acre lake in Marquette County, Michigan with a maximum depth of 51 feet (19-foot average).
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 Greenwood Reservoir
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 Greenwood Reservoir
Compare lakeside cabins, hotels, and vacation rentals near Greenwood Reservoir in Marquette 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 Greenwood Reservoir
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Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 51 ft |
| Average Depth | 19 ft |
| Surface Area | 1,074 acres |
| Shoreline Length | 1.4 mi |
Fishing Greenwood Reservoir
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Frequently asked questions about Greenwood Reservoir
Where is Greenwood Reservoir?
- Greenwood Reservoir is a lake in Marquette 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 Greenwood Reservoir?
- Greenwood Reservoir in Marquette County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Maximum depth: 51 ft. Surface area: 1073.8 acres.
Is Greenwood Reservoir safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Greenwood Reservoir 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 Greenwood Reservoir?
- Greenwood Reservoir has a maximum depth of 51 feet and an average depth of 19 feet. The lake covers 1073.8 acres.
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Where this data comes from
Measurements for Greenwood Reservoir come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.