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Crooked Lake

Emmet County, WisconsinOligotrophic

Crooked Lake is a cold, clear oligotrophic lake in Emmet County, MI. Water quality is graded A based on 2 sampling years through 2024. The lake supports 26 documented fish species including Bluegill, Bluntnose minnow, and Brown bullhead. Compared to the 9 other monitored lakes in Emmet County, Crooked Lake ranks #5 for water quality.

Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2024-10-02. Grade methodology: LakeGrade methodology.

Swimming Safety

Excellent for swimming, crystal clear water with minimal algae

Water Quality Grade: A, Excellent

No clarity data. Phosphorus level: 9 µg/L. Chlorophyll-a: 2 µg/L. Trophic State Index: 37.

MetricValueGrade
Water Clarity (Secchi Depth)No data
Phosphorus9 µg/LA
Chlorophyll-a (Algae)2 µg/LA
Trophic State Index (TSI)37Oligotrophic

Low nutrients, clear water, excellent for swimming

Fish Species

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

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

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

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

Location

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County Ranking

Ranked #5 of 10 lakes in Emmet County

Nearby Lakes in Emmet County

EPA Impairment Status

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

Causes of impairment

MercuryPCBs

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

Source: EPA ATTAINS assessment unit MI040700040202-02 · 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

Most recent sample: 2024-10-02

Monitoring stations: 1