Twin Lakes is a productive, nutrient-rich eutrophic lake in Oakland County, Michigan. Water quality is graded C based on 2 sampling years through 2023. Overall water quality is improving over recent sampling years. The lake supports 7 documented fish species including Bluegill, Fathead minnow, and Golden shiner. Compared to the 44 other monitored lakes in Oakland County, Twin Lakes ranks #37 for water quality.
Source: EPA Water Quality Portal sampling records, Michigan DNR, last sampled 2023-09-22. Grade methodology: LakeGrade methodology.
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Swimming Safety
Generally safe for swimming, moderate water quality
Water Quality Grade: C, Fair
Murky, only visible to about 5 ft. Chlorophyll-a: 6.6 µg/L. Trophic State Index: 52.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 5 ft | D |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | 6.6 µg/L | B |
| Trophic State Index (TSI) | 52 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Twin Lakes
Compare lakeside cabins, hotels, and vacation rentals near Twin Lakes in Oakland 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.
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Fish Species
Click a species to see every graded lake where it is documented.
Fishing Twin Lakes
Water Quality Trend: ↑ Improving
Based on 3 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.89 m/yr | 3 |
| Chlorophyll-a | ↑ Improving | -1.3 µg/L/yr | 3 |
Water Temperature
Twin Lakes averages about 56°F at the surface in summer, usually warmest in Aug (about 57°F) and coldest in May (about 50°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 185 field readings (2021–2023) via the EPA Water Quality Portal. See the full Twin Lakes water temperature breakdown →
Location
County Ranking
Ranked #37 of 45 lakes in Oakland County
Cleaner Lakes Within 30 Miles
Twin Lakes holds Grade C. One nearby lake has a higher grade.
See full comparison →Nearby Lakes in Oakland County
Explore Twin Lakes across LakeGrade
Fish species and top-graded lakes across Michigan
Fish species and best lakes in Oakland County
Species activity outlook by water temperature and season
Where to stay at Michigan's top lakes, each with its grade
High nutrients, frequent algae, reduced clarity
Michigan's cleanest and most-polluted lakes, ranked
More Michigan Lake Rankings
Other Grade C Lakes in Michigan
Lapeer County · Clarity: 9 ft
Lapeer County · Clarity: 7 ft
Lapeer County · Clarity: 7.5 ft
Genesee County · Clarity: 1.8 ft
Genesee County · Clarity: 3.8 ft
Livingston County · Clarity: 9.5 ft
Eutrophic Lakes in Michigan
More records, surveys & data sources
Regulated Pollution Sources Nearby
3 EPA-permitted facilities operate within about 5 miles of Twin Lakes under Clean Water Act (NPDES) discharge permits. 1 facility has a reported Clean Water Act violation in the past three years.
- Trw Vehicle Safety Systems IncWashington · 4.8 mi away · NPDES MIG250059Recent violation
- Natural Aggregates-WashingtonWashington · 3.1 mi away · NPDES MIG490256
- Mdeq-Rrd-House Of ImportsRochester Hills · 4.8 mi away · NPDES MI0058709
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.
Data Sources
Water quality data from the EPA Water Quality Portal
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Grading methodology based on Metropolitan Council standards
Most recent sample: 2023-09-22
Monitoring stations: 1