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LakeQuality
A

Snowden Lake

Oneida County, WisconsinLimited DataOligotrophic

Snowden Lake earns an A — water clarity, phosphorus, and chlorophyll-a all rate among the best monitored waters in Oneida 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.

The lake's low TSI puts it in oligotrophic territory — the cleanest of the four trophic classes, but also the most vulnerable to nutrient-driven shifts. The lake's maximum depth is not yet documented in state morphometric records — context for its physical structure remains limited. At 135 acres, Snowden Lake fits the Wisconsin median for monitored lakes, with partial shoreline records. Among the 140 graded lakes in Oneida County, Snowden Lake sits at rank 55, above the county median.

No invasive species are currently listed at Snowden Lake — the lake remains off the Wisconsin infested-waters roster. Walleye are documented at Snowden Lake, one of 4 fish species on record for the lake. 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, Wisconsin DNR Surface Water, last sampled 2019-06-20. 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 23 ft down. Trophic State Index: 32.

MetricValueGrade
Water Clarity (Secchi Depth)23 ftA
PhosphorusNo data
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)32Oligotrophic

Low nutrients, clear water, excellent for swimming

Lake Details

CharacteristicValue
Surface Area135 acres

Fish Species

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

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

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

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

Water Quality Trend: Stable

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

MetricTrendChange/YearYears
Water Clarity Stable-0.062 m/yr5
See year-by-year chart →

Location

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County Ranking

Ranked #55 of 140 lakes in Oneida County

Nearby Lakes in Oneida County

WI DNR Lake Profile

Authoritative data from the Wisconsin DNR LakePages. 8 stations on file (most recent sample 2023).

Fish Species (DNR-rated)

Panfish(Abundant)Largemouth Bass(Common)Musky(Present)Walleye(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: 2019-06-20

Monitoring stations: 1