Round Lake
Oakland County, Michigan49 acresView mapDirections
Not Rated: one monitoring station are on record, but they measured water clarity only. LakeQuality’s A–F method grades total phosphorus, total nitrogen, chlorophyll-a, and turbidity; clarity is shown, not scored.
- Impaired · Mercury
- 15 ft max depth
- Public access
- Limited data
Round Lake in Oakland County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 10.5 ft visibility. Maximum depth: 15 ft. Surface area: 48.7 acres.
- Clarity
- 10.5 ft
- Max depth
- 15 ft
- Area
- 49 acres
- Trend
- ↑ Improving
- Public access
- Yes
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Watch Round Lake’s letter
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Why Round Lake has no grade
Round Lake has monitoring on record from one station, but only water clarity was measured. LakeQuality’s A–F letter uses total phosphorus, total nitrogen, chlorophyll-a, and turbidity against EPA National Lakes Assessment condition classes. With none of those grading measurements on record, Round Lake is Not Rated — not an F. Its 10.5-foot median from 28 readings collected 2018–2019 is still shown as clarity, but clarity alone cannot earn a letter.
Not Rated is EPA Integrated Reporting Category 3 — insufficient information. 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 49-acre lake in Oakland County, Michigan with a maximum depth of 15 feet. Overall water quality is improving over recent sampling years. The lake supports 37 documented fish species including Black bullhead, Black crappie, and Blackchin shiner. Public access is available.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2019-09-07. Grade methodology: LakeQuality methodology.
What Round Lake is good for
From access and monitoring records, not editorial picks.
- Clear water10.5 ft of visibility
- Fishing37 species recorded
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Round Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.
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 10.5 ft. TSI 43.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 10.5 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 43 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 15 ft |
| Surface Area | 49 acres |
| Public Access | Yes |
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Round Lake
Water Quality Trend: ↑ Improving
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +1.018 m/yr | 5 |
| Phosphorus | ↑ Improving | -0.92 µg/L/yr | 5 |
EPA Impairment Status
Round Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit MI040900050102-02 · Official waterbody report · Matched by proximity (1.62 km)
Graded lakes near Round Lake
Round Lake has no grade, but these lakes within a short drive do.
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) — 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.
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: 10.5 ft visibility. Maximum depth: 15 ft. Surface area: 48.7 acres.
Is Round Lake safe to swim in?
- The letter is not a swimming clearance. Round Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.
How deep is Round Lake?
- Round Lake has a maximum depth of 15 feet. The lake covers 48.7 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
28 measurements from 1 monitoring station, 2018–2019. Retrieved from the EPA Water Quality Portal on 2026-08-26.
Collected and reported by
- North American Lake Management Society
NALMS28 samples · 2018–2019
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