Round Lake
Round Lake in Oakland County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 10 ft visibility. Surface area: 33.5 acres.
- Clarity
- 10 ft
- Mean depth
- ~11 ft est.
- Area
- 34 acres
- Trend
- ↓ Declining
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Why Round Lake has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Round Lake, 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. Sampling here has recorded water clarity, but not phosphorus and algae (chlorophyll-a).
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. 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.
Round Lake is a 34-acre lake in Oakland County, Michigan with an estimated average depth of about 11 feet. Overall water quality is declining over recent sampling years. The lake supports 37 documented fish species including Black bullhead, Black crappie, and Blackchin shiner.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2021-09-15. Grade methodology: LakeQuality methodology.
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Swimming Safety
Not ratedBacteria advisory
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Round Lake
These readings exist but are not enough for an A–F grade — see why.
Good clarity, visible to about 10 ft. Trophic State Index: 44.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 10 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 44 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Round Lake
Compare lakeside cabins, hotels, and vacation rentals near Round Lake 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.
Top-rated places to stay near Round Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Average Depth | ~11 ft est. |
| Surface Area | 34 acres |
Depth marked “est.” is a modeled estimate from HydroLAKES, not a measured survey. Michigan has not published bathymetry for Round 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 graded lake where it is documented.
Fishing Round Lake
Water Quality Trend: ↓ Declining
Based on 3 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | +0.096 m/yr | 3 |
| Phosphorus | ↓ Declining | +1.29 µg/L/yr | 3 |
EPA Impairment Status
Round Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit MI040900030101-05 · Official waterbody report · Matched by proximity (2.7 km)
Nearby Lakes in Oakland County
Frequently asked questions about Round Lake
Where is Round Lake?
- Round Lake is a lake in Oakland County, Michigan. LakeQuality has not rated this lake (UNRATED) — there is not enough recent sampling to assign a letter.
What is the water quality grade for Round Lake?
- Round Lake in Oakland County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 10 ft visibility. Surface area: 33.5 acres.
Is Round Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Round Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
How deep is Round Lake?
- No published bathymetric survey covers Round Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 11 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 33.5 acres.
What fish are in Round Lake?
- Fish species found in Round Lake include Black bullhead, Black crappie, Blackchin shiner, Blacknose shiner, Bluegill, Bluntnose minnow, Brassy minnow, Brook silverside, Brook stickleback, Central mudminnow, Common shiner, Fathead minnow, Golden shiner, Grass pickerel, Green sunfish, Iowa darter, Johnny darter, Lake chubsucker, Largemouth bass, Longnose gar, Muskellunge, Northern logperch, Northern longear sunfish, Northern pike, Pumpkinseed, Redear sunfish, Rock bass, Rosyface shiner, Smallmouth bass, Spotfin shiner, Spottail shiner, Spotted gar, Tadpole madtom, Western banded killifish, White sucker, Yellow bullhead, Yellow perch. Round Lake is located in Oakland County, Michigan.
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Where this data comes from
27 measurements from 1 monitoring station, 2018–2021. Retrieved from the EPA Water Quality Portal on 2026-08-26.
Collected and reported by
- North American Lake Management Society
NALMS27 samples · 2018–2021
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
Lake size & watershed from HydroLAKES (HydroSHEDS)