Island Lake Slough
Island Lake Slough in Schoolcraft County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 29 acres.
- Area
- 29 acres
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Why Island Lake Slough 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 Island Lake Slough, no water-quality sampling on record for this lake.
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.
Island Lake Slough is a 29-acre lake in Schoolcraft County, Michigan.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled recent years. Grade methodology: LakeQuality methodology.
Watch Island Lake Slough 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 Island Lake Slough
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 Island Lake Slough
Compare lakeside cabins, hotels, and vacation rentals near Island Lake Slough in Schoolcraft 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 Island Lake Slough
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 29 acres |
No bathymetric survey has been published for Island Lake Slough, so its depth is not documented here.
Fishing Island Lake Slough
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Frequently asked questions about Island Lake Slough
Where is Island Lake Slough?
- Island Lake Slough is a lake in Schoolcraft County, Michigan. LakeQuality has not rated this lake (UNRATED) — no water-quality sampling on record for this lake.
What is the water quality grade for Island Lake Slough?
- Island Lake Slough in Schoolcraft County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 29 acres.
Is Island Lake Slough safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Island Lake Slough 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 Island Lake Slough come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.