Baldwins Lake
Cass County, Michigan262 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.
- Impaired · Oxygen depletion (low DO)
- 55 ft max depth
- Limited data
Baldwins Lake in Cass County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 8 ft visibility. Maximum depth: 55 ft. Surface area: 262.4 acres.
- Clarity
- 8 ft
- Max depth
- 55 ft
- Area
- 262 acres
- Trend
- ↑ Improving
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Watch Baldwins Lake’s letter
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Free interactive depth-contour map of Baldwins Lake, reaching a maximum surveyed depth of 55 ft. Toggle Depth contours to overlay the bathymetric survey lines. Contour data from Michigan DNR.
Why Baldwins Lake has no grade
Baldwins 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, Baldwins Lake is Not Rated — not an F. Its 8-foot median from 24 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.
Baldwins Lake is a 262-acre lake in Cass County, Michigan with a maximum depth of 55 feet. Overall water quality is improving over recent sampling years. The lake supports 33 documented fish species including Blackchin shiner, Blacknose shiner, and Blackside darter.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2022-09-23. Grade methodology: LakeQuality methodology.
What Baldwins Lake is good for
From access and monitoring records, not editorial picks.
- Fishing33 species recorded
- Deep water55 ft surveyed max depth
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Baldwins Lake is listed impaired under Clean Water Act §303(d) (IR 5) for oxygen depletion (low DO). Check local advisories before you swim.
Water quality measurements for Baldwins Lake
These readings exist but are not enough for an A–F grade — see why.
Moderate clarity, visible to about 8 ft. TSI 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
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 55 ft |
| Surface Area | 262 acres |
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Baldwins Lake
Water Quality Trend: ↑ Improving
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +1.168 m/yr | 5 |
| Phosphorus | ↓ Declining | +1.4 µg/L/yr | 4 |
| Chlorophyll-a | ↑ Improving | -0.35 µg/L/yr | 3 |
EPA Impairment Status
Baldwins Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit MI040500011303-05 · Official waterbody report · Matched by proximity (0.23 km)
Graded lakes near Baldwins Lake
Baldwins Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Cass County
Frequently asked questions about Baldwins Lake
Where is Baldwins Lake?
- Baldwins Lake is a lake in Cass 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 Baldwins Lake?
- Baldwins Lake in Cass County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 8 ft visibility. Maximum depth: 55 ft. Surface area: 262.4 acres.
Is Baldwins Lake safe to swim in?
- The letter is not a swimming clearance. Baldwins Lake is listed impaired under Clean Water Act §303(d) (IR 5) for oxygen depletion (low DO). Check local advisories before you swim.
How deep is Baldwins Lake?
- Baldwins Lake has a maximum depth of 55 feet. The lake covers 262.4 acres.
What fish are in Baldwins Lake?
- Fish species found in Baldwins Lake include Blackchin shiner, Blacknose shiner, Blackside darter, Blackstripe topminnow, Bluegill, Bluntnose minnow, Brook silverside, Central stoneroller, Common carp, Creek chub, Golden redhorse, Grass pickerel, Green sunfish, Hornyhead chub, Iowa darter, Johnny darter, Lake chubsucker, Lake herring, Largemouth bass, Longnose gar, Mimic shiner, Northern logperch, Northern longear sunfish, Pumpkinseed, Rainbow darter, Redear sunfish, Rock bass, Sand shiner, Smallmouth bass, Spotted sucker, Striped shiner, Western banded killifish, Yellow perch. Baldwins Lake is located in Cass County, Michigan.
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Where this data comes from
24 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
NALMS24 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
Impairment status from EPA ATTAINS 303(d) database