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Pokegama Lake

Vilas County, WisconsinOligotrophic

Pokegama Lake earns an A — water clarity, phosphorus, and chlorophyll-a all rate among the best monitored waters in Vilas County. Sub-grades cluster within a single letter of each other, which usually means the lake is in stable trophic balance rather than fighting one specific stressor.

A TSI value of 28 puts Pokegama Lake in the oligotrophic range, where biological productivity stays low and the water column remains clear. The lake's 65 ft maximum depth is in the upper tier for Wisconsin — deep enough for cold-water fish to find refuge in summer. Pokegama Lake covers 1,041 acres alongside partial shoreline records, large enough that conditions can vary meaningfully between bays. Among the 202 graded lakes in Vilas County, Pokegama Lake ranks 47 — in the top quartile locally.

Pokegama Lake has at least one documented invasive species (Chinese Mystery Snail), so boaters and anglers should observe clean-drain-dry steps when leaving the lake. Walleye are documented at Pokegama Lake, one of 6 fish species on record for the lake. 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, Wisconsin DNR Surface Water, last sampled 2024-07-24. Grade methodology: LakeGrade methodology.

Swimming Safety

Excellent for swimming, crystal clear water with minimal algae

Water Quality Grade: A, Excellent

Crystal clear, you can see 54.1 ft down. Phosphorus level: 10 µg/L. Trophic State Index: 28.

MetricValueGrade
Water Clarity (Secchi Depth)54.1 ftA
Phosphorus10 µg/LA
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)28Oligotrophic

Low nutrients, clear water, excellent for swimming

Lake Details

CharacteristicValue
Maximum Depth65 ft
Surface Area1.0K acres

Fish Species

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

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

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

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

Invasive Species

Chinese Mystery SnailRusty Crayfish

Water Quality Trend: Declining

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

MetricTrendChange/YearYears
Water Clarity Declining-4.5 m/yr2
Phosphorus Declining+0.3 µg/L/yr4
See year-by-year chart →

Location

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County Ranking

Ranked #47 of 202 lakes in Vilas County

Nearby Lakes in Vilas County

WI DNR Lake Profile

Authoritative data from the Wisconsin DNR LakePages. 2 stations on file (most recent sample 2019).

Fish Species (DNR-rated)

Panfish(Common)Northern Pike(Common)Walleye(Common)Musky(Present)Largemouth Bass(Present)Smallmouth Bass(Present)

Data Sources

Water quality data from the EPA Water Quality Portal

Grading methodology based on Metropolitan Council standards

Fish and recreation data from Wisconsin DNR Lakes

Most recent sample: 2024-07-24

Monitoring stations: 2