Round Lake
Shiawassee County, Michigan11 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 · Oxygen depletion (low DO)
- Limited data
Round Lake in Shiawassee County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 6.5 ft visibility. Surface area: 11.2 acres.
- Clarity
- 6.5 ft
- Typical in September
- 61°F
- Area
- 11 acres
- Trend
- ↓ Declining
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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 6.5-foot median from 37 readings collected 2021–2022 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 11-acre lake in Shiawassee County, Michigan. 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 2022-09-14. Grade methodology: LakeQuality methodology.
What Round Lake is good for
From access and monitoring records, not editorial picks.
- 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 5) for oxygen depletion (low DO). 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.
Murky, only visible to about 6.5 ft. TSI 50.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 6.5 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 50 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Water Temperature
Round Lake typically sits around 61°F at the surface in September. Summer average is about 60°F. Usually warmest in Aug (about 62°F) and coldest in May (about 53°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 197 field readings (2021–2023) via the EPA Water Quality Portal. See the full Round Lake water temperature breakdown →
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 11 acres |
No bathymetric survey has been published for Round Lake, so its depth is not documented here.
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Round Lake
Water Quality Trend: ↓ Declining
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.126 m/yr | 5 |
| Phosphorus | ↓ Declining | +4.88 µg/L/yr | 5 |
| Chlorophyll-a | ↓ Declining | +1.84 µg/L/yr | 4 |
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
Source: EPA ATTAINS assessment unit MI040802030205-05 · Official waterbody report · Matched by proximity (0.8 km)
Graded lakes near Round Lake
Round Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Shiawassee County
Frequently asked questions about Round Lake
Where is Round Lake?
- Round Lake is a lake in Shiawassee 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 Shiawassee County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 6.5 ft visibility. Surface area: 11.2 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 5) for oxygen depletion (low DO). Check local advisories before you swim.
What is the water temperature of Round Lake?
- Round Lake typically sits around 61°F at the surface in September, from 197 EPA Water Quality Portal field readings (2021–2023). That is a typical value for the month, not a live reading.
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 Shiawassee County, Michigan.
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Where this data comes from
37 measurements from 1 monitoring station, 2021–2022. Retrieved from the EPA Water Quality Portal on 2026-08-26.
Collected and reported by
- North American Lake Management Society
NALMS37 samples · 2021–2022
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