Clearwater Lake
Itasca County, MinnesotaLimited DataMesotrophic
Clearwater Lake sits at a C on the grading scale — not impaired, not pristine, with summer measurements that vary year to year.
A TSI near 45 places Clearwater Lake in the mesotrophic band — moderate productivity, with seasonal swings between clearer spring water and richer late-summer conditions. Clearwater Lake reaches 16 ft at its deepest point — typical for Minnesota mid-sized lakes, with seasonal stratification but limited cold-water refuge. Clearwater Lake covers 132 acres alongside 1.9 miles of shoreline — a mid-sized water that supports a working fishery without being so large that conditions diverge between basins. Clearwater Lake sits at rank 101 of 141 in Itasca County, in the lower half of the local distribution.
No invasive species are currently listed at Clearwater Lake — the lake remains off the Minnesota infested-waters roster. The state fisheries records do not list documented species for Clearwater Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. No formal public access is documented at Clearwater Lake — most use is by shoreline residents and their guests. The lake has a long ice-out record — 57 observations on file, with a median ice-out around Apr 17. 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, Minnesota DNR LakeFinder, last sampled 2023-09-23. Grade methodology: LakeGrade methodology.
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Swimming Safety
Generally safe for swimming, moderate water quality
Water Quality Grade: C, Fair
Moderate clarity, visible to about 9.5 ft. Trophic State Index: 45.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 9.5 ft | C |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 45 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 16 ft |
| Surface Area | 131.59 acres |
| Shoreline Length | 1.9 mi |
| Littoral Zone | 95% |
| Public Access | No |
Water Quality Trend: ↑ Improving
Based on 4 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.465 m/yr | 4 |
Ice Season
Historical ice data from Minnesota DNR (76 observations).
Estimated open water season: 218 days
| Earliest | Latest | |
|---|---|---|
| Ice-Out | 2012-03-22 (2012) | 2013-05-10 (2013) |
| Ice-In | 2017-11-03 (2017) | 2016-12-06 (2016) |
Most recent ice-out: 2024-04-05
Location
County Ranking
Ranked #101 of 141 lakes in Itasca County
Cleaner Lakes Within 30 Miles
Clearwater Lake holds Grade C. 2 nearby lakes hold higher grades.
Nearby Lakes in Itasca County
More Minnesota Lake Rankings
State Parks Near Clearwater Lake
Other Grade C Lakes in Minnesota
Mesotrophic Lakes in Minnesota
DNR Fisheries Survey Summary
1 survey on file from MN DNR Fisheries. Most recent: 1983-07-25 (Standard Survey).
Top Species by Catch Rate
| Species | Avg CPUE | Avg Weight |
|---|---|---|
| Black Bullhead | 67.88 | 0.21 lb |
| Yellow Perch | 15.75 | 0.18 lb |
| Brown Bullhead | 12.75 | 0.28 lb |
| Northern Pike | 12.63 | 1.21 lb |
| Pumpkinseed | 4.13 | 0.22 lb |
| Bowfin | 0.63 | 4.16 lb |
CPUE = catch per unit effort, averaged across surveys (excludes juvenile shoreline seining). Higher CPUE = more abundant in standardized sampling.
From the 1983-07-25 survey
VERY HIGH BULLHEAD, NORTHERN PIKE AND PERCH POPULATIONS. FISH SPECIES COMPOSITION IS INDICA- TIVE OF A WINTERKILL LAKE.
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Clearwater Lake. 2 reports on file.
- —Fisheries Lake Survey — ClearwaterFisheries Lake Survey · MN DNR LakeFinder
- —Aquatic Plant Report — Clearwater (0572)Aquatic Plant Report · MN DNR LakeFinder
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Lake details from Minnesota DNR LakeFinder
Ice data from Minnesota DNR Climate
Most recent sample: 2023-09-23
Monitoring stations: 1