Round Lake
Lenawee County, Michigan65 acresView mapDirections
EGLE publishes the water-quality measurements for Round Lake. Here is what has been measured.
- Impaired · Mercury
- Public access
- Limited data
Round Lake in Lenawee County, Michigan has water-quality measurements published by EGLE, shown here as reported. Water clarity: 10 ft visibility. Surface area: 65 acres.
Round Lake is a 65-acre lake in Lenawee County, Michigan. Overall water quality is declining over recent sampling years. The lake supports 5 documented fish species including Blackchin shiner, Sand shiner, and Spottail shiner. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2019-09-21. Methodology: how these readings are compared.
What Round Lake is good for
From access and monitoring records, not editorial picks.
- Clear water10 ft of visibility
- Boat launch1 documented ramp
- Fishing5 species recorded
Swimming conditions
No readingLimited data
Nutrient and algae readings are 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.
Whether Round 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 Round Lake
These are the measurements EGLE publishes for Round 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 Round Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
65 acres
Public access
Yes
Listed by EGLE
No bathymetric survey has been published for Round Lake, so its depth is not documented here.
Recreation & Access
- Hayes State ParkPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
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Stays near Round Lake
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Fish Species
Click a species to see every lake where it is documented.
Fishing Round Lake
Water quality readings over time
3 seasons of samples on record (2017–2019). Calling a direction takes at least 4 years of the same measurement.
Water clarity
Worsening3 years
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
Designated uses not supporting: Fish consumption.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit MI041000020106-03 · Official waterbody report
Nearby Lakes in Lenawee County
Frequently asked questions about Round Lake
Where is Round Lake?
- Round Lake is a lake in Lenawee County, Michigan. Its water-quality measurements are published by EGLE and shown on this page as reported.
What is the water quality of Round Lake?
- Round Lake in Lenawee County, Michigan has water-quality measurements published by EGLE, shown here as reported. Water clarity: 10 ft visibility. Surface area: 65 acres.
Is Round Lake safe to swim in?
- Nutrient and algae readings are 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.
What fish are in Round Lake?
- Fish species found in Round Lake include Blackchin shiner, Sand shiner, Spottail shiner, Tadpole madtom, Western banded killifish. Round Lake is located in Lenawee County, Michigan.
Are there boat ramps on Round Lake?
- Round Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Hayes State Park. Public access is listed as yes.
Can I fish at Round Lake?
- Round Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Michigan's fish and wildlife agency, so check its current regulations before you go.
Explore Round Lake across LakeQuality
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Where this data comes from
17 measurements from 1 monitoring station, 2017–2019. Retrieved from the EPA Water Quality Portal on 2026-08-26.
Collected and reported by
- Michigan EGLE - MiCorps
21MICH_MICORPS17 samples · 2017–2019
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.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database
Named boat-access points from the USGS National Boat Ramps inventory