Brewer Lake
Cass County, WisconsinEutrophic
Brewer Lake is a 130-acre productive, nutrient-rich eutrophic lake in Cass County, ND. Water quality is graded D based on 2 sampling years through 2020.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2020-10-21. 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 4.3 ft. Chlorophyll-a: 31.1 µg/L. Trophic State Index: 60.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 4.3 ft | D |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | 31.1 µg/L | F |
| Trophic State Index (TSI) | 60 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 130 acres |
Location
County Ranking
Ranked #1 of 1 lakes in Cass County
Cleaner Lakes Within 30 Miles
Brewer Lake holds Grade D. One nearby lake has a higher grade.
See full comparison →Nearby Lakes in Cass County
More Wisconsin Lake Rankings
Other Grade D Lakes in Wisconsin
Eutrophic Lakes in Wisconsin
Reservoir Info (USACE NID)
Brewer Lake is a man-made reservoir impounded by the Erie Dam (completed 1970), built primarily for recreation on the Rush River - TR; earth-type dam, 51 ft tall and 810 ft long.
- Surface area
- 130 ac
- Normal storage
- 1,650 ac-ft
- Max storage
- 3,050 ac-ft
- Drainage area
- 7.73 sq mi
- Hazard class
- Significant
- Owner
- ND Game and Fish
All listed purposes: Recreation;Fish and Wildlife Pond.
Source: USACE National Inventory of Dams, NID ID ND00030 · Operator website
EPA Impairment Status
Brewer Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit ND-09020204-003-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: 2020-10-21
Monitoring stations: 1