Swan Lake
Allegan County, Michigan214 acresView mapDirections
EGLE publishes the water-quality measurements for Swan Lake. Here is what has been measured.
- Impaired · Nutrients (phosphorus, nitrogen)
- 30 ft max depth
- Public access
- Limited data
Ask about Swan Lake
Answers come straight from the public measurements and survey records on this page.
Swan Lake in Allegan County, Michigan has water-quality measurements published by EGLE, shown here as reported. Water clarity: 3 ft visibility. Phosphorus: 65 µg/L. Surface area: 214.2 acres.
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Swan Lake is a 214-acre lake in Allegan County, Michigan with an estimated average depth of about 30 feet. The lake supports 2 documented fish species including Bigmouth shiner and Weed shiner. Public access is available.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2023-09-24. Grade methodology: LakeQuality methodology.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Swan Lake is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Whether Swan 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 Swan Lake
These are the measurements EGLE publishes for Swan Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Very murky, less than 3 ft of visibility. Phosphorus 65 µg/L. TSI 63.
| Metric | Value | EPA condition class |
|---|---|---|
| Water Clarity (Secchi Depth) | 3 ft | Measured, not scored |
| Phosphorus | 65 µg/L | Measured, not scored |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 63 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~30 ft est. |
| Average Depth | ~13 ft est. |
| Surface Area | 214 acres |
| Public Access | Yes |
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Michigan has not published bathymetry for Swan Lake.
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
Fish Species
Click a species to see every lake where it is documented.
Fishing Swan Lake
EPA Impairment Status
Swan 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 MI040500030908-02 · Official waterbody report · Matched by proximity (0.25 km)
Nearby Lakes in Allegan County
Frequently asked questions about Swan Lake
Where is Swan Lake?
- Swan Lake is a lake in Allegan County, Michigan. Its water-quality measurements are published by EGLE and shown on this page as reported.
What is the water quality of Swan Lake?
- Swan Lake in Allegan County, Michigan has water-quality measurements published by EGLE, shown here as reported. Water clarity: 3 ft visibility. Phosphorus: 65 µg/L. Surface area: 214.2 acres.
Is Swan Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Swan Lake is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
How deep is Swan Lake?
- No published bathymetric survey covers Swan Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 30 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate. The lake covers 214.2 acres.
What fish are in Swan Lake?
- Fish species found in Swan Lake include Bigmouth shiner, Weed shiner. Swan Lake is located in Allegan County, Michigan.
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Where this data comes from
16 measurements from 1 monitoring station, 2023. Retrieved from the EPA Water Quality Portal on 2026-08-26.
Collected and reported by
- Michigan EGLE - MiCorps
21MICH_MICORPS16 samples · 2023
Analytical methods
- Phosphorus by Colorimetry
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
Lake size & watershed from HydroLAKES (HydroSHEDS)