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C

Smetana Lake

Hennepin County, MinnesotaEutrophic

Smetana Lake sits at a C on the grading scale — not impaired, not pristine, with summer measurements that vary year to year. Clarity is the limiting factor — phosphorus is reasonable but suspended particles or algal cells keep water transparency below Minnesota norms.

At a TSI of 51, Smetana Lake reads as eutrophic — nutrient-rich enough that summer algal growth and reduced clarity are expected, not unusual. A maximum depth of just 12 ft means sediment-bound phosphorus releases back into the water column whenever wind stirs the bottom — a classic shallow-lake dynamic. The lake is compact at 52 acres, with 1.6 miles of shoreline and little volume to buffer nutrient inputs. Within Hennepin County's 104 graded waters, Smetana Lake sits at rank 21, near the top of the local distribution.

Eurasian watermilfoil has been documented at Smetana Lake, requiring shoreline management to keep dense mats from crowding native vegetation. The fishery is bass-led, with 13 documented species across the lake's records. The lake lacks a documented public access point, so visitor use is limited. Multiple sampling years from Minnesota PCA volunteers and partner agencies back the grade, so the letter should hold steady absent a major watershed shift.

Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2024-10-19. Grade methodology: LakeGrade methodology.

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Swimming Safety

Generally safe for swimming, moderate water quality

Water Quality Grade: C, Fair

Murky, only visible to about 6.6 ft. Phosphorus level: 34 µg/L. Chlorophyll-a: 6.4 µg/L. Trophic State Index: 51.

MetricValueGrade
Water Clarity (Secchi Depth)6.6 ftD
Phosphorus34 µg/LC
Chlorophyll-a (Algae)6.4 µg/LB
Trophic State Index (TSI)51Eutrophic

High nutrients, frequent algae, reduced clarity

Lake Details

CharacteristicValue
Maximum Depth12 ft
Average Depth5 ft
Surface Area52.23 acres
Shoreline Length1.6 mi
Littoral Zone100%
Public AccessNo

Fish Species

Click a species to see every graded lake where it is documented.

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

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

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

Invasive & Introduced Species

Red chips are ecologically harmful invasive species. Gray chips are stocked or introduced fish that aren't a current ecological concern.

Eurasian watermilfoil

Water Quality Trend: Declining

Based on 6 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Declining-0.067 m/yr6
Phosphorus Declining+1.07 µg/L/yr6
See year-by-year chart →

Location

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County Ranking

Ranked #21 of 104 lakes in Hennepin County

Cleaner Lakes Within 30 Miles

Smetana Lake holds Grade C. One nearby lake has a higher grade.

See full comparison →

Nearby Lakes in Hennepin County

EPA Impairment Status

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

Causes of impairment

Mercury

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

Source: EPA ATTAINS assessment unit MN27-0073-00 · 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

Lake details from Minnesota DNR LakeFinder

Most recent sample: 2024-10-19

Monitoring stations: 1