Deer Island Lake
Gogebic County, Michigan297 acresView mapDirections
Not Rated: one monitoring station are on record, but they measured water clarity only. LakeQuality’s A–F method grades total phosphorus, total nitrogen, chlorophyll-a, and turbidity; clarity is shown, not scored.
- 53 ft max depth
- Limited data
Deer Island Lake in Gogebic County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 11.5 ft visibility. Maximum depth: 53 ft. Surface area: 297.4 acres.
- Clarity
- 11.5 ft
- Max depth
- 53 ft
- Area
- 297 acres
- Trend
- ↑ Improving
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Watch Deer Island Lake’s letter
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Free interactive depth-contour map of Deer Island Lake, reaching a maximum surveyed depth of 53 ft. Toggle Depth contours to overlay the bathymetric survey lines. Contour data from Michigan DNR.
Why Deer Island Lake has no grade
Deer Island Lake has monitoring on record from one station, but only water clarity was measured. LakeQuality’s A–F letter uses total phosphorus, total nitrogen, chlorophyll-a, and turbidity against EPA National Lakes Assessment condition classes. With none of those grading measurements on record, Deer Island Lake is Not Rated — not an F. Its 11.5-foot median from 3 readings collected 2017–2023 is still shown as clarity, but clarity alone cannot earn a letter.
Not Rated is EPA Integrated Reporting Category 3 — insufficient information. 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.
Deer Island Lake is a 297-acre lake in Gogebic County, Michigan with a maximum depth of 53 feet. Overall water quality is improving over recent sampling years.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2023-09-07. Grade methodology: LakeQuality methodology.
What Deer Island Lake is good for
From access and monitoring records, not editorial picks.
- Clear water11.5 ft of visibility
- Deep water53 ft surveyed max depth
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Check local advisories before you swim.
Water quality measurements for Deer Island Lake
These readings exist but are not enough for an A–F grade — see why.
Good clarity, visible to about 11.5 ft. TSI 42.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 11.5 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 42 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 53 ft |
| Surface Area | 297 acres |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Fishing Deer Island Lake
Water Quality Trend: ↑ Improving
Based on 3 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +1.5 m/yr | 3 |
Nearby Lakes in Gogebic County
Frequently asked questions about Deer Island Lake
Where is Deer Island Lake?
- Deer Island Lake is a lake in Gogebic 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 Deer Island Lake?
- Deer Island Lake in Gogebic County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 11.5 ft visibility. Maximum depth: 53 ft. Surface area: 297.4 acres.
Is Deer Island Lake safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
How deep is Deer Island Lake?
- Deer Island Lake has a maximum depth of 53 feet. The lake covers 297.4 acres.
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Where this data comes from
3 measurements from 1 monitoring station, 2017–2023. Retrieved from the EPA Water Quality Portal on 2026-08-26.
Collected and reported by
- Eastern Regional Office
USFSEASTERN3 samples · 2017–2023
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)