Skip to main content
LakeQuality
A

Red Cedar Lake

Barron County, WisconsinMesotrophic

Red Cedar Lake earns an A — every scored parameter (clarity and phosphorus) rates among the best monitored waters in Barron County. clarity and phosphorus rate similarly, so there is no obvious single lever to pull on watershed management.

A TSI near 45 places Red Cedar Lake in the mesotrophic band — moderate productivity, with seasonal swings between clearer spring water and richer late-summer conditions. Red Cedar Lake is unusually deep for Wisconsin at 53 ft, which buffers the lake against summer warming and helps the deep water stay oxygenated. At 1,897 acres, Red Cedar Lake is one of the larger lakes in Barron County, with partial shoreline records supporting multiple distinct use patterns. Within Barron County's 37 graded waters, Red Cedar Lake sits at rank 3, near the top of the local distribution.

An invasive species record — Chinese Mystery Snail — has been logged at Red Cedar Lake; Wisconsin DNR maintains the official infested-waters list. Walleye are documented at Red Cedar Lake, one of 5 fish species on record for the lake. 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 2025-09-22. Grade methodology: LakeGrade methodology.

Reviewed by LakeQuality Editorial Team · Updated

Track Red Cedar Lake

Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.

Swimming Safety

Excellent for swimming, crystal clear water with minimal algae

Water Quality Grade: A, Excellent

Good clarity, visible to about 10.1 ft. Phosphorus level: 17.4 µg/L. Trophic State Index: 45.

MetricValueGrade
Water Clarity (Secchi Depth)10.1 ftB
Phosphorus17.4 µg/LA
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)45Mesotrophic

Moderate nutrients, good water quality

Lake Details

CharacteristicValue
Maximum Depth53 ft
Surface Area1.9K acres

Fish Species

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

→ Best fishing times for Red Cedar Lake (14-day solunar calendar)

→ Is it safe to eat fish from Red Cedar Lake? (mercury & PFAS guide)

Red Cedar Lake fishing regulations (limits, seasons, special rules)

Invasive & Introduced Species

Red chips are ecologically harmful invasive species. Gray chips are stocked or introduced fish that aren't a current ecological concern.

Chinese Mystery SnailCurly-Leaf PondweedPurple LoosestrifeRusty Crayfish

Water Quality Trend: Improving

Based on 2 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Phosphorus Improving-1.48 µg/L/yr2

Location

Loading map…

County Ranking

Ranked #3 of 37 lakes in Barron County

Nearby Lakes in Barron County

WI DNR Lake Profile

Authoritative data from the Wisconsin DNR LakePages. 12 stations on file (most recent sample 2025).

DNR Assessment
Reported
Trophic State Index 51 (eutrophic) · 5-year average

Fish Species (DNR-rated)

Largemouth Bass(Common)Smallmouth Bass(Common)Northern Pike(Common)Walleye(Common)Panfish(Present)

DNR Reports & Resources

Wisconsin DNR Fisheries scientists publish multi-year survey reports for Red Cedar Lake covering fish populations, stocking, water quality, and management. 1 report on file.

EPA Impairment Status

Red Cedar Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5R).

Causes of impairment

Nutrients (phosphorus, nitrogen)

Source: EPA ATTAINS assessment unit WI10004632 · 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

Most recent sample: 2025-09-22

Monitoring stations: 4