Lake Whittlesey
Keweenaw County, WisconsinMesotrophic
Lake Whittlesey is a mesotrophic lake in Keweenaw County, MI. Water quality is graded B based on 2 sampling years through 2024. The lake supports 8 documented fish species including Blacknose shiner, Northern pike, and Shortjaw cisco. Compared to the 18 other monitored lakes in Keweenaw County, Lake Whittlesey ranks #15 for water quality.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2024-08-22. Grade methodology: LakeGrade methodology.
Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
Good clarity, visible to about 11.6 ft. Phosphorus level: 23.3 µg/L. Trophic State Index: 46.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 11.6 ft | B |
| Phosphorus | 23.3 µg/L | B |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 46 | Mesotrophic |
Moderate nutrients, good water quality
Fish Species
Click a species to see all Wisconsin and Minnesota lakes where it is found.
→ Best fishing times for Lake Whittlesey (14-day solunar calendar)
→ Is it safe to eat fish from Lake Whittlesey? (mercury & PFAS guide)
→ Lake Whittlesey fishing regulations (limits, seasons, special rules)
Location
County Ranking
Ranked #15 of 19 lakes in Keweenaw County
Cleaner Lakes Within 30 Miles
Lake Whittlesey holds Grade B. 3 nearby lakes hold higher grades.
- ASiskiwit LakeKeweenaw County · 4.8 mi · Higher grade (B → A)
- ALake HarveyKeweenaw County · 5.6 mi · Higher grade (B → A)
- ASargent LakeKeweenaw County · 5.7 mi · Higher grade (B → A)
Nearby Lakes in Keweenaw County
More Wisconsin Lake Rankings
Other Grade B Lakes in Wisconsin
Lapeer County · Clarity: 9.5 ft
Livingston County · Clarity: 13 ft
Manistee County · Clarity: 11 ft
Lake County · Clarity: 14 ft
Cass County · Clarity: 10.5 ft
Genesee County · Clarity: 10 ft
Mesotrophic Lakes in Wisconsin
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2024-08-22
Monitoring stations: 1