Baldwin Lake
Cass County, MichiganView mapDirections
EGLE publishes the water-quality measurements for Baldwin Lake. Here is what has been measured.
- Impaired · Oxygen depletion (low DO)
- Limited data
Baldwin Lake in Cass County, Michigan has water-quality measurements published by EGLE, shown here as reported. Water clarity: 9 ft visibility.
Baldwin Lake is a lake in Cass County, Michigan. Overall water quality is improving over recent sampling years. The lake supports 25 documented fish species including Blacknose shiner, Blackside darter, and Blackstripe topminnow.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2019-09-21. Methodology: how these readings are compared.
What Baldwin Lake is good for
From access and monitoring records, not editorial picks.
- Fishing25 species recorded
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Baldwin Lake is listed impaired under Clean Water Act §303(d) (IR 5) for oxygen depletion (low DO). Check local advisories before you swim.
Whether Baldwin Lake is safe to swim in today is a call for the Michigan Department of Environment, Great Lakes, and Energy (EGLE) and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Baldwin Lake
These are the measurements EGLE publishes for Baldwin Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Moderate clarity, visible to about 9 ft. TSI 45.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 9ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | No reading The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. | |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 45 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Baldwin Lake
Answers come straight from the public measurements and survey records on this page.
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Fish Species
Click a species to see every lake where it is documented.
Fishing Baldwin Lake
Water Quality Trend: Improving
Based on 5 years of monitoring (2019–2023).
Water clarity
Improving5 years
Phosphorus
Worsening+1.4 µg/L/yr4 years
Chlorophyll-a
Improving-0.35 µg/L/yr3 years
EPA Impairment Status
Baldwin Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Designated uses not supporting: Aquatic life.
Source: EPA ATTAINS assessment unit MI040500011303-05 · Official waterbody report
Nearby Lakes in Cass County
Frequently asked questions about Baldwin Lake
Where is Baldwin Lake?
- Baldwin Lake is a lake in Cass County, Michigan. Its water-quality measurements are published by EGLE and shown on this page as reported.
What is the water quality of Baldwin Lake?
- Baldwin Lake in Cass County, Michigan has water-quality measurements published by EGLE, shown here as reported. Water clarity: 9 ft visibility.
Is Baldwin Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Baldwin Lake is listed impaired under Clean Water Act §303(d) (IR 5) for oxygen depletion (low DO). Check local advisories before you swim.
What fish are in Baldwin Lake?
- Fish species found in Baldwin Lake include Blacknose shiner, Blackside darter, Blackstripe topminnow, Bluegill, Bluntnose minnow, Brook silverside, Central stoneroller, Creek chub, Golden redhorse, Grass pickerel, Green sunfish, Hornyhead chub, Iowa darter, Johnny darter, Largemouth bass, Longnose gar, Mimic shiner, Northern logperch, Northern longear sunfish, Sand shiner, Smallmouth bass, Spotted sucker, Striped shiner, Western banded killifish, Yellow perch. Baldwin Lake is located in Cass County, Michigan.
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Where this data comes from
12 measurements from 1 monitoring station, 2019. Retrieved from the EPA Water Quality Portal on 2026-08-26.
Collected and reported by
- Michigan EGLE - MiCorps
21MICH_MICORPS12 samples · 2019
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database