Coot Lake
Jackson County, WisconsinEutrophic
Coot Lake is a 23-acre productive, nutrient-rich eutrophic lake in Jackson County, MO. Water quality is graded F based on 3 sampling years through 2023. Compared to the 26 other monitored lakes in Jackson County, Coot Lake ranks #13 for water quality.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2023-10-03. 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 1.6 ft of visibility. Phosphorus level: 77.2 µg/L. Chlorophyll-a: 43.7 µg/L. Trophic State Index: 68.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.6 ft | F |
| Phosphorus | 77.2 µg/L | D |
| Chlorophyll-a (Algae) | 43.7 µg/L | F |
| Trophic State Index (TSI) | 68 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 23 acres |
Location
County Ranking
Ranked #13 of 27 lakes in Jackson County
Cleaner Lakes Within 30 Miles
Coot Lake holds Grade F. One nearby lake has a higher grade.
See full comparison →Nearby Lakes in Jackson County
More Wisconsin Lake Rankings
Other Grade F Lakes in Wisconsin
St. Louis County · Clarity: 1.6 ft
St. Charles County · Clarity: 2.3 ft
St. Francois County · Clarity: 1.1 ft
Saline County · Clarity: 2.3 ft
Polk County · Clarity: 1.2 ft
Callaway County · Clarity: 1.7 ft
Eutrophic Lakes in Wisconsin
Reservoir Info (USACE NID)
Coot Lake is a man-made reservoir impounded by the Reed Area No 3 (completed 1958), built primarily for other on the TR BIG CREEK; earth-type dam, 34 ft tall.
- Surface area
- 23 ac
- Normal storage
- 140 ac-ft
- Max storage
- 418 ac-ft
- Drainage area
- 225 sq mi
- Hazard class
- High
- Owner
- MO DEPT OF CONSERVATION
All listed purposes: Other;Recreation.
Source: USACE National Inventory of Dams, NID ID MO20032 · Operator website · Matched by proximity (0.06 km)
EPA Impairment Status
Coot Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit MO_7378.00 · 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: 2023-10-03
Monitoring stations: 2