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F

Rice Lake

Scott County, MinnesotaHypereutrophic

On the LakeGrade rubric Rice Lake fails the cutoffs — a TSI of 76 and persistent algal pressure put it in the bottom tier. Sub-grades cluster within a single letter of each other, which usually means the lake is in stable trophic balance rather than fighting one specific stressor.

A TSI above 70 puts Rice Lake in hypereutrophic territory: visible blooms are common, and clarity rarely climbs even in early summer. The lake's maximum depth is not yet documented in state morphometric records — context for its physical structure remains limited. The lake's surface area is not consistently recorded across state datasets — physical context remains partial. Within Scott County's 24 graded lakes, Rice Lake ranks 16 — below the local median, though not at the bottom.

No invasive species are currently listed at Rice Lake — the lake remains off the Minnesota infested-waters roster. The state fisheries records do not list documented species for Rice Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. No formal public access is documented at Rice Lake — most use is by shoreline residents and their guests. The grade is supported by multiple sampling years from Minnesota PCA volunteers and partner agencies, giving the letter a reasonably stable foundation.

Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2024-10-22. Grade methodology: LakeGrade methodology.

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Swimming Safety

Avoid swimming, very poor water quality, potential algae toxins

Water Quality Grade: F, Very Poor

Very murky, less than 1.7 ft of visibility. Phosphorus level: 647 µg/L. Chlorophyll-a: 25.5 µg/L. Trophic State Index: 76.

MetricValueGrade
Water Clarity (Secchi Depth)1.7 ftF
Phosphorus647 µg/LF
Chlorophyll-a (Algae)25.5 µg/LD
Trophic State Index (TSI)76Hypereutrophic

Very high nutrients, dense algae, poor clarity

Water Quality Trend: Improving

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

MetricTrendChange/YearYears
Water Clarity Improving+0.27 m/yr2

Location

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County Ranking

Ranked #16 of 24 lakes in Scott County

Cleaner Lakes Within 30 Miles

Rice Lake holds Grade F. 4 nearby lakes hold higher grades.

See full comparison →

Nearby Lakes in Scott County

Hypereutrophic Lakes in Minnesota

Data Sources

Water quality data from the EPA Water Quality Portal

Grading methodology based on Metropolitan Council standards

Most recent sample: 2024-10-22

Monitoring stations: 2