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West Sylvia Lake

Wright County, MinnesotaOligotrophic

West Sylvia Lake sits at the top of the Minnesota PCA grading rubric with an A, a mark reached by the cleanest lakes in Minnesota. With clarity and phosphorus scored, the sub-grades cluster within a letter of each other, pointing to stable conditions rather than one specific stressor.

Trophically, West Sylvia Lake reads as oligotrophic — nutrient-poor, clear, and ecologically more sensitive to disturbance than richer lakes. At 97 ft of maximum depth, West Sylvia Lake stratifies reliably through the summer — the hypolimnion stays cooler and clearer than the surface layer suggests. At 904 acres, West Sylvia Lake fits the Minnesota median for monitored lakes, with 12.7 miles of shoreline. West Sylvia Lake ranks 4 of 64 in Wright County, putting it in the upper tier of locally monitored lakes.

Zebra mussel presence at West Sylvia Lake means the lake's clarity numbers carry an asterisk — filtered water is not the same as nutrient-poor water. Walleye are documented at West Sylvia Lake, one of 15 fish species on record for the lake. Public access is available — the lake is on the Minnesota PCA public-access list. The lake has a partial ice record — 11 observed ice-outs, centered near Apr 23. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.

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

Reviewed by LakeQuality Editorial Team · Updated

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Swimming Safety

Excellent for swimming, crystal clear water with minimal algae

Water Quality Grade: A, Excellent

Crystal clear, you can see 22 ft down. Phosphorus level: 8 µg/L. Trophic State Index: 33.

MetricValueGrade
Water Clarity (Secchi Depth)22 ftA
Phosphorus8 µg/LA
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)33Oligotrophic

Low nutrients, clear water, excellent for swimming

Lake Details

CharacteristicValue
Maximum Depth97 ft
Average Depth32.7 ft
Surface Area904.39 acres
Shoreline Length12.7 mi
Littoral Zone27%
Public AccessYes

Fish Species

black bullhead,black crappie,bluegill,bowfin (dogfish),brown bullhead,common carp,green sunfish,hybrid sunfish,largemouth bass,northern pike,pumpkinseed,rock bass,walleye,yellow bullhead,yellow perch

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

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

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

West Sylvia 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 watermilfoilstarry stonewortzebra mussel

Water Quality Trend: Declining

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

MetricTrendChange/YearYears
Water Clarity Declining-0.271 m/yr5
Phosphorus Declining+0.3 µg/L/yr5
See year-by-year chart →

Ice Season

Historical ice data from Minnesota DNR (15 observations).

Typical Ice-Out
Apr 23
Typical Ice-In
Dec 7

Estimated open water season: 228 days

EarliestLatest
Ice-Out2024-03-16 (2024)2013-05-02 (2013)
Ice-In2007-12-03 (2007)2024-12-12 (2024)

Most recent ice-out: 2024-03-16

Location

Loading map…

County Ranking

Ranked #4 of 64 lakes in Wright County

Nearby Lakes in Wright County

DNR Fisheries Survey Summary

13 surveys on file from MN DNR Fisheries. Most recent: 2025-07-21 (Targeted Survey).

Top Species by Catch Rate

SpeciesAvg CPUEAvg Weight
Largemouth Bass28.830.69 lb
Bluegill13.560.19 lb
Yellow Bass8.960.63 lb
Bluntnose Minnow7.45
Hybrid Sunfish5.220.29 lb
CNM5.02

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.

Largemouth Bass

192 fish · 421 in · 2025-07-21
38190trophy 20468101214161820

Bluegill

109 fish · 39 in · 2025-07-21
25130trophy 103456789

Yellow Bass

100 fish · 512 in · 2025-07-21
2915056789101112

Bluntnose Minnow

1 fish · 11 in · 2002-07-29
101

From the 2025-07-21 survey

A targeted survey of nearshore fish species in West Lake Sylvia was conducted on July 21, 2025 by Sauk Rapids fisheries staff. Sampling sites were evenly spaced around the lake and each was sampled by backpack electrofishing and seining with a 50-foot or 15-foot seine, where possible. Backpack electrofishing was…

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 West Sylvia Lake. 4 reports on file.

EPA Impairment Status

West Sylvia 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 MN86-0279-00 · 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: 2024-10-10

Monitoring stations: 2