Round Lake
Chippewa County, WisconsinMesotrophic
On the LakeGrade scale Round Lake grades a B, with clarity at 8.4 ft and 18 µg/L of phosphorus placing it above the Wisconsin median. The lake's weakest score is on Secchi depth — the water looks more turbid than its phosphorus number alone would predict.
The lake sits in the mesotrophic zone — the band where most well-managed Wisconsin lakes fall. A maximum depth of 18 ft puts Round Lake in the middle of Wisconsin's depth distribution. Round Lake covers 216 acres alongside partial shoreline records — a mid-sized water that supports a working fishery without being so large that conditions diverge between basins. Round Lake ranks 5 of 15 in Chippewa County — solidly in the upper half of the local distribution.
No invasive species are currently listed at Round Lake — the lake remains off the Wisconsin infested-waters roster. The fishery includes walleye alongside the lake's other 5 documented species — a notable draw for Wisconsin anglers. A documented public access point at Round Lake makes the lake usable for shore fishing, paddle craft, and trailered boats. Monitoring depth is thin here: the LakeGrade rubric is applied to a small number of sample years, and the grade will be revised as more data accumulates.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2026-04-21. Grade methodology: LakeGrade methodology.
Watch Round Lake water quality
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Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
Moderate clarity, visible to about 8.4 ft. Phosphorus level: 18.1 µg/L. Trophic State Index: 46.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 8.4 ft | C |
| Phosphorus | 18.1 µg/L | A |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 46 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 18 ft |
| Surface Area | 216 acres |
| Public Access | Yes |
Fish Species
Click a species to see every graded lake where it is documented.
→ Best fishing times for Round Lake (14-day solunar calendar)
→ Is it safe to eat fish from Round Lake? (mercury & PFAS guide)
→ Round Lake fishing regulations (limits, seasons, special rules)
Water Quality Trend: ↑ Improving
Based on 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.48 m/yr | 5 |
| Phosphorus | ↑ Improving | -1.02 µg/L/yr | 6 |
Recreation & Access
Location
County Ranking
Ranked #5 of 15 lakes in Chippewa County
Cleaner Lakes Within 30 Miles
Round Lake holds Grade B. 3 nearby lakes hold higher grades.
- ATwo Island LakeChippewa County · mi · Higher grade (B → A)
- ALong LakeChippewa County · mi · Higher grade (B → A)
- AAxhandle LakeChippewa County · mi · Higher grade (B → A)
Nearby Lakes in Chippewa County
More Wisconsin Lake Rankings
State Parks Near Round Lake
Other Grade B Lakes in Wisconsin
Mesotrophic Lakes in Wisconsin
WI DNR Lake Profile
Authoritative data from the Wisconsin DNR LakePages. 4 stations on file (most recent sample 2025).
Fish Species (DNR-rated)
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 WI10008932 · Official waterbody report
Data Sources
Water quality data from the EPA Water Quality Portal
Impairment status from EPA ATTAINS 303(d) database
Grading methodology based on Metropolitan Council standards
Fish and recreation data from Wisconsin DNR Lakes
Public boat-access points from the USGS National Boat Ramps inventory
Most recent sample: 2026-04-21
Monitoring stations: 1
Where to stay near Round Lake
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