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LakeQuality
D

Rice Lake

Walworth County, WisconsinEutrophic

Rice Lake pulls a D on the LakeGrade rubric — phosphorus loading and limited clarity hold it below the Wisconsin average. The lake's weakest score is on Secchi depth — the water looks more turbid than its phosphorus number alone would predict.

A TSI in the eutrophic range signals a lake doing what nutrient-loaded waters do — supporting an active algal community at the cost of clear water. At only 10 ft deep, Rice Lake is shallow — wind keeps the water column mixed and sediment resuspension drives phosphorus levels harder to manage. Rice Lake covers 144 acres alongside partial shoreline records — a mid-sized water that supports a working fishery without being so large that conditions diverge between basins. Rice Lake ranks 27 of 35 in Walworth County — at the lower end of the locally monitored distribution.

Eurasian watermilfoil is established at Rice Lake, which can dampen recreational access and pressure the native plant community. The fishery is bass-led, with 3 documented species across the lake's records. A documented public access point at Rice Lake makes the lake usable for shore fishing, paddle craft, and trailered boats. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.

Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2026-06-19. Grade methodology: LakeGrade methodology.

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Swimming Safety

Swimming not recommended, poor water quality with high algae risk

Water Quality Grade: D, Poor

Very murky, less than 1.7 ft of visibility. Phosphorus level: 57.2 µg/L. Trophic State Index: 66.

MetricValueGrade
Water Clarity (Secchi Depth)1.7 ftF
Phosphorus57.2 µg/LC
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)66Eutrophic

High nutrients, frequent algae, reduced clarity

Lake Details

CharacteristicValue
Maximum Depth10 ft
Surface Area144 acres
Public AccessYes

Fish Species

Click a species to see every graded lake where it is documented.

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

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

Rice 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.

Curly-Leaf PondweedEurasian Water-MilfoilHybrid Eurasian / Northern Water-MilfoilPurple Loosestrife

Water Quality Trend: Declining

Based on 7 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Declining-0.233 m/yr7
Phosphorus Declining+1.38 µg/L/yr6
See year-by-year chart →

Recreation & Access

1
Boat Landings
Yes
Public Access

Location

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County Ranking

Ranked #27 of 35 lakes in Walworth County

Cleaner Lakes Within 30 Miles

Rice Lake holds Grade D. 5 nearby lakes hold higher grades.

See full comparison →

Nearby Lakes in Walworth County

WI DNR Lake Profile

Authoritative data from the Wisconsin DNR LakePages. Monitored by volunteers since 1986. 3 stations on file (most recent sample 2025).

DNR Assessment
Fair · Reservoir lake
Trophic State Index 64 (eutrophic) · 5-year average

Fish Species (DNR-rated)

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

Reservoir Info (USACE NID)

Rice Lake is a man-made reservoir impounded by the Rice Lake (completed 1968), built primarily for recreation on the Trib Whitewater Creek; earth-type dam, 18 ft tall and 200 ft long.

Surface area
137 ac
Normal storage
460 ac-ft
Max storage
1,140 ac-ft
Drainage area
11.8 sq mi
Hazard class
High
Owner
Wisconsin Department of Natural Resources

Source: USACE National Inventory of Dams, NID ID WI00856 · Operator website

EPA Impairment Status

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

Causes of impairment

Nutrients (phosphorus, nitrogen)

Source: EPA ATTAINS assessment unit WI10001551 · 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: 2026-06-19

Monitoring stations: 1

Where to stay near Rice Lake

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

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