Loon Lake
Oscoda County, Michigan89 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.
- 50 ft max depth
- Limited data
Loon Lake in Oscoda County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 21 ft visibility. Maximum depth: 50 ft. Surface area: 88.7 acres.
- Clarity
- 21 ft
- Max depth
- 50 ft
- Area
- 89 acres
- Trend
- ↓ Declining
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Stays near Loon Lake
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Watch Loon Lake’s letter
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Free interactive depth-contour map of Loon Lake, reaching a maximum surveyed depth of 50 ft. Toggle Depth contours to overlay the bathymetric survey lines. Contour data from Michigan DNR.
Why Loon Lake has no grade
Loon 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, Loon Lake is Not Rated — not an F. Its 21-foot median from 17 readings collected 2019–2022 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.
Loon Lake is a 89-acre lake in Oscoda County, Michigan with a maximum depth of 50 feet. Overall water quality is declining over recent sampling years. The lake supports 13 documented fish species including Black bullhead, Blackchin shiner, and Bluegill.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2022-09-09. Grade methodology: LakeQuality methodology.
What Loon Lake is good for
From access and monitoring records, not editorial picks.
- Clear water21 ft of visibility
- Fishing13 species recorded
- Camping2 public campgrounds nearby
- Deep water50 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 Loon Lake
These readings exist but are not enough for an A–F grade — see why.
Crystal clear, you can see 21 ft down. TSI 33.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 21 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 33 | Oligotrophic |
Low nutrients, clear water. The letter is not a swimming clearance.
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 50 ft |
| Surface Area | 89 acres |
Recreation & Access
Public campgrounds near Loon Lake
- Island Lake Recreation Area0.9 km
- Wagner Lake Recreation Area4.1 km
Nearest public campgrounds in the USGS National Map inventory, within about 3 miles. An empty list means USGS records no campground that close, which is not the same as camping being unavailable. Where the source gives an official reservation link, it is used; the cabin and hotel search does not cover campsites. More camping lakes
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Loon Lake
Water Quality Trend: ↓ Declining
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -2.14 m/yr | 2 |
| Phosphorus | ↓ Declining | +0.33 µg/L/yr | 2 |
Nearby Lakes in Oscoda County
Frequently asked questions about Loon Lake
Where is Loon Lake?
- Loon Lake is a lake in Oscoda 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 Loon Lake?
- Loon Lake in Oscoda County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 21 ft visibility. Maximum depth: 50 ft. Surface area: 88.7 acres.
Is Loon Lake safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
How deep is Loon Lake?
- Loon Lake has a maximum depth of 50 feet. The lake covers 88.7 acres.
What fish are in Loon Lake?
- Fish species found in Loon Lake include Black bullhead, Blackchin shiner, Bluegill, Bluntnose minnow, Central mudminnow, Green sunfish, Lake herring, Largemouth bass, Pumpkinseed, Rock bass, Western banded killifish, White sucker, Yellow perch. Loon Lake is located in Oscoda County, Michigan.
Are there campgrounds on Loon Lake?
- Loon Lake has 2 public campgrounds from USGS The National Map within 5 km, including Island Lake Recreation Area, Wagner Lake Recreation Area. This is a location join, not a booking. Cabins and hotels are listed separately; campsite reservations use the official link when the source provides one.
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Where this data comes from
17 measurements from 1 monitoring station, 2019–2022. Retrieved from the EPA Water Quality Portal on 2026-08-26.
Collected and reported by
- North American Lake Management Society
NALMS17 samples · 2019–2022
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
Public campgrounds from USGS The National Map Structures, within about 3 miles