Cedar Lake
Slope County, WisconsinHypereutrophic
Cedar Lake is a 210-acre highly nutrient-loaded hypereutrophic lake in Slope County, ND. Water quality is graded F based on 2 sampling years through 2023. Compared to the 1 other monitored lakes in Slope County, Cedar Lake ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2023-10-10. 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 1.3 ft of visibility. Chlorophyll-a: 53.4 µg/L. Trophic State Index: 71.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.3 ft | F |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | 53.4 µg/L | F |
| Trophic State Index (TSI) | 71 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 210 acres |
Location
County Ranking
Ranked #2 of 2 lakes in Slope County
Cleaner Lakes Within 30 Miles
Cedar Lake holds Grade F. 5 nearby lakes hold higher grades.
- CKalina Dam LakeBowman County · 26.3 mi · Two grade letters higher (F → C)
- CIndian Creek Dam LakeHettinger County · 16.5 mi · Two grade letters higher (F → C)
- CLarson LakeHettinger County · 23.6 mi · Two grade letters higher (F → C)
- CBowman-Haley Dam LakeBowman County · 25 mi · Two grade letters higher (F → C)
- DGascoyne LakeBowman County · 12.5 mi · Higher grade (F → D)
Nearby Lakes in Slope County
More Wisconsin Lake Rankings
Other Grade F Lakes in Wisconsin
Hypereutrophic Lakes in Wisconsin
Reservoir Info (USACE NID)
Cedar Lake is a man-made reservoir impounded by the Cedar Lake Dam (completed 1935), built primarily for fish and wildlife pond on the Cedar Creek; earth-type dam, 23 ft tall and 723 ft long.
- Surface area
- 210 ac
- Normal storage
- 1,255 ac-ft
- Max storage
- 2,875 ac-ft
- Drainage area
- 208 sq mi
- Hazard class
- Low
- Owner
- ND Game & Fish
All listed purposes: Fish and Wildlife Pond;Recreation.
Source: USACE National Inventory of Dams, NID ID ND00122 · Operator website
EPA Impairment Status
Cedar 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 ND-10130205-003-L_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: 2023-10-10
Monitoring stations: 1