Earl Lake
Livingston County, WisconsinLimited DataEutrophic
Earl Lake is a productive, nutrient-rich eutrophic lake in Livingston County, MI. Water quality is graded D based on 1 sampling years through 2021. Compared to the 19 other monitored lakes in Livingston County, Earl Lake ranks #20 for water quality.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2021-09-12. Grade methodology: LakeGrade methodology.
Swimming Safety
Swimming not recommended, poor water quality with high algae risk
Water Quality Grade: D, Poor
Murky, only visible to about 5.5 ft. Trophic State Index: 53.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 5.5 ft | D |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 53 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Location
County Ranking
Ranked #20 of 20 lakes in Livingston County
Cleaner Lakes Within 30 Miles
Earl Lake holds Grade D. 4 nearby lakes hold higher grades.
- AOre Lake West Basin; Hamburg TownshipLivingston County · 9.7 mi · Two grade letters higher (D → A)
- BOneida Lake East Central BasinLivingston County · 9.6 mi · Two grade letters higher (D → B)
- BBass LakeLivingston County · 10.3 mi · Two grade letters higher (D → B)
- CEarl Lake Central BasinLivingston County · 0 mi · Higher grade (D → C)
Nearby Lakes in Livingston County
More Wisconsin Lake Rankings
Other Grade D Lakes in Wisconsin
Eutrophic Lakes in Wisconsin
EPA Impairment Status
Earl Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit MI040802030104-08 · 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: 2021-09-12
Monitoring stations: 1