East Twin Lake
East Twin Lake in Montmorency County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 8 ft visibility. Maximum depth: 25 ft. Surface area: 820.4 acres.
- Clarity
- 8 ft
- Max depth
- 25 ft
- Area
- 820 acres
- Trend
- ↓ Declining
- Public access
- Yes
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Free interactive depth-contour map of East Twin Lake, reaching a maximum surveyed depth of 25 ft. Toggle Depth contours to overlay the bathymetric survey lines. Contour data from Michigan DNR.
Why East Twin Lake 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 East Twin Lake, 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. Sampling here has recorded water clarity, but not phosphorus and algae (chlorophyll-a).
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.
East Twin Lake is a 820-acre lake in Montmorency County, Michigan with a maximum depth of 25 feet. Overall water quality is declining over recent sampling years. The lake supports 7 documented fish species including Johnny darter, Largemouth bass, and Mimic shiner. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2022-09-07. Grade methodology: LakeQuality methodology.
Watch East Twin Lake water quality
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Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for East Twin Lake
These readings exist but are not enough for an A–F grade — see why.
Moderate clarity, visible to about 8 ft. Trophic State Index: 47.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 8 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 47 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near East Twin Lake
Compare lakeside cabins, hotels, and vacation rentals near East Twin Lake in Montmorency 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 East Twin Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 25 ft |
| Surface Area | 820 acres |
| Public Access | Yes |
Recreation & Access
- East Twin LakePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fish Species
Click a species to see every graded lake where it is documented.
Fishing East Twin Lake
Water Quality Trend: ↓ Declining
Based on 8 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.743 m/yr | 8 |
| Phosphorus | ↓ Declining | +0.85 µg/L/yr | 7 |
| Chlorophyll-a | ↓ Declining | +0.14 µg/L/yr | 7 |
Graded lakes near East Twin Lake
East Twin Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Montmorency County
Frequently asked questions about East Twin Lake
Where is East Twin Lake?
- East Twin Lake is a lake in Montmorency County, Michigan. LakeQuality has not rated this lake (UNRATED) — there is not enough recent sampling to assign a letter.
What is the water quality grade for East Twin Lake?
- East Twin Lake in Montmorency County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 8 ft visibility. Maximum depth: 25 ft. Surface area: 820.4 acres.
Is East Twin Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. East Twin Lake 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 East Twin Lake?
- East Twin Lake has a maximum depth of 25 feet. The lake covers 820.4 acres.
What fish are in East Twin Lake?
- Fish species found in East Twin Lake include Johnny darter, Largemouth bass, Mimic shiner, Smallmouth bass, Spottail shiner, White sucker, Yellow perch. East Twin Lake is located in Montmorency County, Michigan.
Are there boat ramps on East Twin Lake?
- East Twin Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include East Twin Lake. Public access is listed as yes.
Explore East Twin Lake across LakeQuality
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Where this data comes from
128 measurements from 1 monitoring station, 2016–2022. Retrieved from the EPA Water Quality Portal on 2026-08-26.
Collected and reported by
- North American Lake Management Society
NALMS128 samples · 2016–2022
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
Named boat-access points from the USGS National Boat Ramps inventory