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B

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.

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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.

MetricValueGrade
Water Clarity (Secchi Depth)8.4 ftC
Phosphorus18.1 µg/LA
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)46Mesotrophic

Moderate nutrients, good water quality

Lake Details

CharacteristicValue
Maximum Depth18 ft
Surface Area216 acres
Public AccessYes

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).

MetricTrendChange/YearYears
Water Clarity Improving+0.48 m/yr5
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 #5 of 15 lakes in Chippewa County

Cleaner Lakes Within 30 Miles

Round Lake holds Grade B. 3 nearby lakes hold higher grades.

See full comparison →

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)

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

Mercury

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

Compare lakeside cabins, hotels, and vacation rentals near Round Lake in Chippewa County, Wisconsin — live availability and prices for your trip.

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