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LakeQuality
A

Round Lake

Chippewa County, WisconsinMesotrophic

Round Lake earns an A — water clarity, phosphorus, and chlorophyll-a all rate among the best monitored waters in Chippewa County. Clarity, phosphorus, and chlorophyll-a all rate similarly, so there is no obvious single lever to pull on watershed management.

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. Among the 16 graded lakes in Chippewa County, Round Lake ranks 3 — in the top quartile locally.

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 2025-09-11. Grade methodology: LakeGrade methodology.

Swimming Safety

Excellent for swimming, crystal clear water with minimal algae

Water Quality Grade: A, Excellent

Crystal clear, you can see 18.5 ft down. Phosphorus level: 18.1 µg/L. Trophic State Index: 41.

MetricValueGrade
Water Clarity (Secchi Depth)18.5 ftA
Phosphorus18.1 µg/LA
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)41Mesotrophic

Moderate nutrients, good water quality

Lake Details

CharacteristicValue
Maximum Depth18 ft
Surface Area216 acres
Public AccessYes

Fish Species

Click a species to see all Wisconsin and Minnesota lakes where it is found.

→ 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 7 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Stable+0.041 m/yr6
Phosphorus Improving-1.02 µg/L/yr6
See year-by-year chart →

Recreation & Access

1
Boat Landings
Yes
Public Access

Location

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County Ranking

Ranked #3 of 16 lakes in Chippewa County

Nearby Lakes in Chippewa County

WI DNR Lake Profile

Authoritative data from the Wisconsin DNR LakePages. 4 stations on file (most recent sample 2025).

DNR Assessment
Good · Shallow Seepage lake
Trophic State Index 53 (eutrophic) · 5-year average

Fish Species (DNR-rated)

Musky(Common)Panfish(Common)Largemouth Bass(Common)Northern Pike(Common)Walleye(Common)

Data Sources

Water quality data from the EPA Water Quality Portal

Grading methodology based on Metropolitan Council standards

Fish and recreation data from Wisconsin DNR Lakes

Most recent sample: 2025-09-11

Monitoring stations: 1