Seymour Lake
Oakland County, Michigan58 acresView mapDirections
EGLE publishes the water-quality measurements for Seymour Lake. Here is what has been measured.
- 21 ft max depth
- Limited data
Seymour Lake in Oakland County, Michigan has water-quality measurements published by EGLE, shown here as reported. Water clarity: 10 ft visibility. Maximum depth: 21 ft. Surface area: 57.5 acres.
Free interactive depth-contour map of Seymour Lake, reaching a maximum surveyed depth of 21 ft. Toggle Depth contours to overlay the bathymetric survey lines. Contour data from Michigan DNR.
Seymour Lake is a 58-acre lake in Oakland County, Michigan with a maximum depth of 21 feet. Water clarity is improving over recent sampling years.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2022-09-14. Methodology: how these readings are compared.
Seymour Lake covers about 58 acres in Oakland County. If you are planning to stay, you can search lake houses and cabins around Seymour Lake on Vrbo, or look for a hotel room near the lake on Booking.com or Expedia.
What Seymour Lake is good for
From access and monitoring records, not editorial picks.
- Clear water10 ft of visibility
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Seymour 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 Seymour Lake
These are the measurements EGLE publishes for Seymour Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Good clarity, visible to about 10 ft. TSI 44.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 10ft | 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. | 44 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Seymour Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
21 ft
Surface area
58 acres
Stays via Stay22
Stays near Seymour Lake
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Fishing Seymour Lake
Water Quality Trend: Stable
Based on 6 years of monitoring (2018–2023).
Water clarity
Improving6 years
Phosphorus
Worsening+0.43 µg/L/yr5 years
Nearby Lakes in Oakland County
Frequently asked questions about Seymour Lake
Where is Seymour Lake?
- Seymour Lake is a lake in Oakland County, Michigan. Its water-quality measurements are published by EGLE and shown on this page as reported.
What is the water quality of Seymour Lake?
- Seymour Lake in Oakland County, Michigan has water-quality measurements published by EGLE, shown here as reported. Water clarity: 10 ft visibility. Maximum depth: 21 ft. Surface area: 57.5 acres.
Is Seymour Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Seymour Lake?
- Seymour Lake has a maximum depth of 21 feet. The lake covers 57.5 acres.
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Where this data comes from
98 measurements from 1 monitoring station, 2018–2022. Retrieved from the EPA Water Quality Portal on 2026-08-26.
Collected and reported by
- North American Lake Management Society
NALMS98 samples · 2018–2022
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.