Kelly Lake
Rice County, MinnesotaMesotrophic
Kelly Lake carries a solid B grade — strong on most parameters, with measurements that hold up well across the summer season. With clarity and phosphorus scored, the sub-grades cluster within a letter of each other, pointing to stable conditions rather than one specific stressor.
The lake sits in the mesotrophic zone — the band where most well-managed Minnesota lakes fall. 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. Kelly Lake ranks 1 of 12 in Rice County, putting it in the upper tier of locally monitored lakes.
No invasive species are currently listed at Kelly Lake — the lake remains off the Minnesota infested-waters roster. The state fisheries records do not list documented species for Kelly Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. A documented public access point at Kelly Lake makes the lake usable for shore fishing, paddle craft, and trailered boats. The lake has a partial ice record — 13 observed ice-outs, centered near Mar 29. 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, Minnesota DNR LakeFinder, last sampled 2023-08-29. 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 8.2 ft. Phosphorus level: 29 µg/L. Trophic State Index: 50.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 8.2 ft | C |
| Phosphorus | 29 µg/L | B |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 50 | Mesotrophic |
Moderate nutrients, good water quality
Water Quality Trend: ↓ Declining
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Phosphorus | ↓ Declining | +4.5 µg/L/yr | 2 |
Ice Season
Historical ice data from Minnesota DNR (22 observations).
Estimated open water season: 248 days
| Earliest | Latest | |
|---|---|---|
| Ice-Out | 2024-03-01 (2024) | 2018-04-29 (2018) |
| Ice-In | 2022-11-20 (2022) | 2015-12-19 (2015) |
Most recent ice-out: 2026-03-26
Location
County Ranking
Ranked #1 of 12 lakes in Rice County
Nearby Lakes in Rice County
More Minnesota Lake Rankings
State Parks Near Kelly Lake
Other Grade B Lakes in Minnesota
Mesotrophic Lakes in Minnesota
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Kelly Lake. 2 reports on file.
- —Aquatic Plant Report — Kelly (1387)Aquatic Plant Report · MN DNR LakeFinder
- —Public Water Access Sites — KellyPublic Water Access Sites · MN DNR LakeFinder
EPA Impairment Status
Kelly Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit MN66-0038-00 · Official waterbody report · Matched by proximity (2.32 km)
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
Ice data from Minnesota DNR Climate
Most recent sample: 2023-08-29
Monitoring stations: 1