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.
Watch Rice Lake water quality
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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.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.7 ft | F |
| Phosphorus | 57.2 µg/L | C |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 66 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 10 ft |
| Surface Area | 144 acres |
| Public Access | Yes |
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.
Water Quality Trend: ↓ Declining
Based on 7 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.233 m/yr | 7 |
| Phosphorus | ↓ Declining | +1.38 µg/L/yr | 6 |
Recreation & Access
Location
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.
- ATurtle LakeWalworth County · mi · Two grade letters higher (D → A)
- AGreen LakeWalworth County · mi · Two grade letters higher (D → A)
- AMiddle LakeWalworth County · mi · Two grade letters higher (D → A)
- BMill LakeWalworth County · mi · Two grade letters higher (D → B)
- CWhitewater LakeWalworth County · mi · Higher grade (D → C)
Nearby Lakes in Walworth County
More Wisconsin Lake Rankings
State Parks Near Rice Lake
Other Grade D Lakes in Wisconsin
Eutrophic Lakes in Wisconsin
WI DNR Lake Profile
Authoritative data from the Wisconsin DNR LakePages. Monitored by volunteers since 1986. 3 stations on file (most recent sample 2025).
Fish Species (DNR-rated)
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
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
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