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B

Lac Lavon Lake

Dakota County, MinnesotaLimited DataMesotrophic

On the LakeGrade scale Lac Lavon Lake grades a B, with clarity at 12.8 ft and phosphorus readings still being added placing it above the Minnesota median.

Mesotrophic conditions dominate at Lac Lavon Lake: enough nutrients for a healthy fishery, not so much that algal blooms become a chronic problem. A maximum depth of 32 ft puts Lac Lavon Lake in the middle of Minnesota's depth distribution. The lake is compact at 66 acres, with 2.1 miles of shoreline and little volume to buffer nutrient inputs. Lac Lavon Lake ranks 4 of 36 in Dakota County, putting it in the upper tier of locally monitored lakes.

Eurasian watermilfoil has been documented at Lac Lavon Lake, requiring shoreline management to keep dense mats from crowding native vegetation. Bass fishing is part of the appeal: the species list runs to 9, anchored by largemouth and/or smallmouth bass. Public access is available — the lake is on the Minnesota PCA public-access list. The lake has a partial ice record — 9 observed ice-outs, centered near Apr 10. 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 2022-09-13. 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

Good clarity, visible to about 12.8 ft. Trophic State Index: 40.

MetricValueGrade
Water Clarity (Secchi Depth)12.8 ftB
PhosphorusNo data
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)40Mesotrophic

Moderate nutrients, good water quality

Lake Details

CharacteristicValue
Maximum Depth32 ft
Surface Area65.89 acres
Shoreline Length2.1 mi
Littoral Zone39%
Public AccessYes

Fish Species

black bullhead,black crappie,bluegill,green sunfish,hybrid sunfish,largemouth bass,northern pike,pumpkinseed,white sucker

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

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

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

Lac Lavon 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 watermilfoilbrittle naiad

Water Quality Trend: Stable

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

MetricTrendChange/YearYears
Water Clarity Stable-0.039 m/yr5
See year-by-year chart →

Ice Season

Historical ice data from Minnesota DNR (12 observations).

Typical Ice-Out
Apr 10
EarliestLatest
Ice-Out2025-03-26 (2025)2008-04-20 (2008)
Ice-In2007-12-02 (2007)2024-01-15 (2024)

Most recent ice-out: 2025-03-26

Location

Loading map…

County Ranking

Ranked #4 of 36 lakes in Dakota County

Nearby Lakes in Dakota County

DNR Fisheries Survey Summary

6 surveys on file from MN DNR Fisheries. Most recent: 2004-07-26 (Standard Survey).

Top Species by Catch Rate

SpeciesAvg CPUEAvg Weight
Bluegill40.610.08 lb
Hybrid Sunfish3.950.14 lb
Black Crappie3.180.3 lb
Northern Pike3.151.72 lb
Pumpkinseed2.250.12 lb
Walleye1.502.98 lb

CPUE = catch per unit effort, averaged across surveys (excludes juvenile shoreline seining). Higher CPUE = more abundant in standardized sampling.

Length Distributions

Number of fish caught at each inch class in the most recent survey that recorded lengths. Red dashed line marks an approximate trophy threshold for that species.

Bluegill

352 fish · 27 in · 2004-07-26
174870234567

Hybrid Sunfish

21 fish · 26 in · 2004-07-26
95023456

Black Crappie

9 fish · 38 in · 2004-07-26
420345678

Northern Pike

25 fish · 1325 in · 2004-07-26
63013141516171819202122232425

From the 2004-07-26 survey

Bluegill are the most abundant species in Lac Lavon Lake. Their numbers are down from previous assessments but are still within the normal range for this type of lake. The average size sampled was only in the 4 inch range. Northern pike were sampled in high abundance. Lengths ranged from 13.5 to 25.63 inches. Black…

Source: MN DNR LakeFinder Fisheries Lake Survey

DNR Reports & Resources

Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Lac Lavon Lake. 2 reports on file.

EPA Impairment Status

Lac Lavon 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 MN19-0446-00 · 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

Ice data from Minnesota DNR Climate

Most recent sample: 2022-09-13

Monitoring stations: 3