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D

Hoff Lake

Pope County, MinnesotaLimited DataEutrophic

On the scoring rubric Hoff Lake grades a D: clarity at 6.0 ft and phosphorus readings still being added keep it in the lower bracket for Pope County.

At a TSI of 51, Hoff Lake reads as eutrophic — nutrient-rich enough that summer algal growth and reduced clarity are expected, not unusual. 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. Hoff Lake ranks 19 of 25 in Pope County — at the lower end of the locally monitored distribution.

No invasive species are currently listed at Hoff Lake — the lake remains off the Minnesota infested-waters roster. The state fisheries records do not list documented species for Hoff Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. No formal public access is documented at Hoff Lake — most use is by shoreline residents and their guests. 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 2023-09-18. Grade methodology: LakeGrade methodology.

Reviewed by LakeQuality Editorial Team · Updated

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Swimming Safety

Swimming not recommended, poor water quality with high algae risk

Water Quality Grade: D, Poor

Murky, only visible to about 6 ft. Trophic State Index: 51.

MetricValueGrade
Water Clarity (Secchi Depth)6 ftD
PhosphorusNo data
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)51Eutrophic

High nutrients, frequent algae, reduced clarity

Water Quality Trend: Stable

Based on 3 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Stable+0.026 m/yr3

Location

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County Ranking

Ranked #19 of 25 lakes in Pope County

Cleaner Lakes Within 30 Miles

Hoff Lake holds Grade D. 4 nearby lakes hold higher grades.

Nearby Lakes in Pope County

EPA Impairment Status

Hoff 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 MN61-0106-00 · Official waterbody report · Matched by proximity (2.04 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

Most recent sample: 2023-09-18

Monitoring stations: 1