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Hazeltine Lake

Carver County, MinnesotaHypereutrophic

On the LakeGrade rubric Hazeltine Lake fails the cutoffs — a TSI of 77 and persistent algal pressure put it in the bottom tier. The two scored sub-grades — clarity and phosphorus — track close together, so neither one is dragging the average down.

The hypereutrophic status — TSI 77 — reflects sustained heavy nutrient loading from the surrounding watershed and frequent algal pressure. 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. Hazeltine Lake ranks 31 of 40 in Carver County — at the lower end of the locally monitored distribution.

No invasive species are currently listed at Hazeltine Lake — the lake remains off the Minnesota infested-waters roster. 3 fish species are on record, with panfish making up the recreational core. 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 2024-10-23. Grade methodology: LakeGrade methodology.

Reviewed by LakeQuality Editorial Team · Updated

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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 ft of visibility. Phosphorus level: 151 µg/L. Trophic State Index: 77.

MetricValueGrade
Water Clarity (Secchi Depth)1 ftF
Phosphorus151 µg/LF
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)77Hypereutrophic

Very high nutrients, dense algae, poor clarity

Fish Species

black bullhead,bluegill,green sunfish

Click a species to see all Minnesota and Wisconsin lakes where it is found.

→ Best fishing times for Hazeltine Lake (14-day solunar calendar)

→ Is it safe to eat fish from Hazeltine Lake? (mercury & PFAS guide)

Hazeltine Lake fishing regulations (limits, seasons, special rules)

Water Quality Trend: Improving

Based on 5 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Improving+0.025 m/yr5
Phosphorus Improving-4.3 µg/L/yr5
See year-by-year chart →

Location

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County Ranking

Ranked #31 of 40 lakes in Carver County

Cleaner Lakes Within 30 Miles

Hazeltine Lake holds Grade F. 5 nearby lakes hold higher grades.

See full comparison →

Nearby Lakes in Carver County

Hypereutrophic Lakes in Minnesota

EPA Impairment Status

Hazeltine 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 MN10-0014-00 · 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: 2024-10-23

Monitoring stations: 2