Crabtree Lake
Cook County, WisconsinLimited DataEutrophic
Crabtree Lake is a productive, nutrient-rich eutrophic lake in Cook County, IL. Water quality is graded F based on 1 sampling years through 2022. Compared to the 67 other monitored lakes in Cook County, Crabtree Lake ranks #49 for water quality.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2022-09-28. Grade methodology: LakeGrade methodology.
Swimming Safety
Avoid swimming, very poor water quality, potential algae toxins
Water Quality Grade: F, Very Poor
Very murky, less than 2 ft of visibility. Trophic State Index: 67.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2 ft | F |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 67 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Location
County Ranking
Ranked #49 of 68 lakes in Cook County
Cleaner Lakes Within 30 Miles
Crabtree Lake holds Grade F. 2 nearby lakes hold higher grades.
- BSilver LakeMcHenry County · 10 mi · Two grade letters higher (F → B)
- CWoods Creek LakeMcHenry County · 9.3 mi · Two grade letters higher (F → C)
Nearby Lakes in Cook County
More Wisconsin Lake Rankings
Other Grade F Lakes in Wisconsin
Eutrophic Lakes in Wisconsin
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2022-09-28
Monitoring stations: 1