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B

Kittleson Lake

Polk County, MinnesotaEutrophic

On the LakeGrade scale Kittleson Lake grades a B, with clarity at 7.1 ft and 26 µg/L of phosphorus placing it above the Minnesota median. With clarity and phosphorus scored, the sub-grades cluster within a letter of each other, pointing to stable conditions rather than one specific stressor.

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. 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. Among the 20 graded lakes in Polk County, Kittleson Lake sits at rank 7, above the county median.

No invasive species are currently listed at Kittleson Lake — the lake remains off the Minnesota infested-waters roster. The state fisheries records do not list documented species for Kittleson Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. The lake lacks a documented public access point, so visitor use is limited. 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 2023-09-26. Grade methodology: LakeGrade methodology.

Reviewed by LakeQuality Editorial Team · Updated

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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 7.1 ft. Phosphorus level: 26 µg/L. Trophic State Index: 50.

MetricValueGrade
Water Clarity (Secchi Depth)7.1 ftC
Phosphorus26 µg/LB
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)50Eutrophic

High nutrients, frequent algae, reduced clarity

Water Quality Trend: Stable

Based on 4 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Improving+0.22 m/yr4
Phosphorus Declining+0.9 µg/L/yr4
See year-by-year chart →

Location

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County Ranking

Ranked #7 of 20 lakes in Polk County

Cleaner Lakes Within 30 Miles

Kittleson Lake holds Grade B. 2 nearby lakes hold higher grades.

See full comparison →

Nearby Lakes in Polk County

EPA Impairment Status

Kittleson Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).

Causes of impairment

Nutrients (phosphorus, nitrogen)

A Total Maximum Daily Load (TMDL) plan has been approved.

Source: EPA ATTAINS assessment unit MN60-0327-00 · 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

Most recent sample: 2023-09-26

Monitoring stations: 1