Eagle Lake
Eagle Lake in Cass County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 7 ft visibility. Maximum depth: 35 ft. Surface area: 399.2 acres.
- Clarity
- 7 ft
- Max depth
- 35 ft
- Area
- 399 acres
- Trend
- ↑ Improving
Next lake in Cass County
Swipe left or right on this bar to open the next or previous lake.
Why Eagle 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 Eagle 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.
Eagle Lake is a 399-acre lake in Cass County, Michigan with a maximum depth of 35 feet. Overall water quality is improving over recent sampling years. The lake supports 22 documented fish species including Black crappie, Blackchin shiner, and Blacknose shiner.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2022-09-15. Grade methodology: LakeQuality methodology.
Watch Eagle Lake water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Eagle Lake
These readings exist but are not enough for an A–F grade — see why.
Moderate clarity, visible to about 7 ft. Trophic State Index: 49.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 7 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 49 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Eagle Lake
Compare lakeside cabins, hotels, and vacation rentals near Eagle Lake in Cass 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 Eagle Lake
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a whole trip? See where to stay at Michigan’s top lakes →
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 35 ft |
| Surface Area | 399 acres |
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Eagle Lake
Water Quality Trend: ↑ Improving
Based on 8 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.219 m/yr | 8 |
| Phosphorus | ↑ Improving | -0.45 µg/L/yr | 7 |
| Chlorophyll-a | ↓ Declining | +0.36 µg/L/yr | 7 |
EPA Impairment Status
Eagle Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit MI040500011403-04 · Official waterbody report
Regulated Pollution Sources Nearby
1 EPA-permitted facility operate within about 5 miles of Eagle Lake under Clean Water Act (NPDES) discharge permits.
- Prairieview Farm, Phase TwoElkhart · 3.4 mi away · NPDES INR10P510
Facilities permitted to discharge under the Clean Water Act within ~5 miles; proximity does not by itself mean a facility affects this lake. Source: EPA ECHO (ICIS-NPDES), as of 2026-07.
Graded lakes near Eagle Lake
Eagle Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Cass County
Frequently asked questions about Eagle Lake
Where is Eagle Lake?
- Eagle Lake is a lake in Cass 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 Eagle Lake?
- Eagle Lake in Cass County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 7 ft visibility. Maximum depth: 35 ft. Surface area: 399.2 acres.
Is Eagle Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Eagle 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 Eagle Lake?
- Eagle Lake has a maximum depth of 35 feet. The lake covers 399.2 acres.
What fish are in Eagle Lake?
- Fish species found in Eagle Lake include Black crappie, Blackchin shiner, Blacknose shiner, Bluegill, Bluntnose minnow, Brook silverside, Grass pickerel, Green sunfish, Iowa darter, Largemouth bass, Longnose gar, Northern longear sunfish, Northern pike, Pumpkinseed, Rock bass, Sand shiner, Smallmouth bass, Walleye, Warmouth, Western banded killifish, Yellow bullhead, Yellow perch. Eagle Lake is located in Cass County, Michigan.
Explore Eagle Lake across LakeQuality
Fish species and top-graded lakes across Michigan
Fish species and best lakes in Cass County
Species activity outlook by water temperature and season
Where to stay at Michigan's top lakes, each with its grade
Michigan's cleanest and most-polluted lakes, ranked
More Michigan Lake Rankings
Other Lakes in Michigan
Mesotrophic Lakes in Michigan
Where this data comes from
106 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
NALMS106 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
Impairment status from EPA ATTAINS 303(d) database
Regulated discharger data from EPA ECHO (ICIS-NPDES)