Brookfield Lake
Linn County, WisconsinMesotrophic
Brookfield Lake is a 106-acre mesotrophic lake in Linn County, MO. Water quality is graded B based on 3 sampling years through 2024. Compared to the 3 other monitored lakes in Linn County, Brookfield Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2024-08-07. Grade methodology: LakeGrade methodology.
Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
Murky, only visible to about 4.4 ft. Phosphorus level: 19.7 µg/L. Chlorophyll-a: 4.9 µg/L. Trophic State Index: 50.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 4.4 ft | D |
| Phosphorus | 19.7 µg/L | A |
| Chlorophyll-a (Algae) | 4.9 µg/L | A |
| Trophic State Index (TSI) | 50 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 106 acres |
Location
County Ranking
Ranked #1 of 4 lakes in Linn County
Cleaner Lakes Within 30 Miles
Brookfield Lake holds Grade B. One nearby lake has a higher grade.
See full comparison →Nearby Lakes in Linn County
More Wisconsin Lake Rankings
Other Grade B Lakes in Wisconsin
Mesotrophic Lakes in Wisconsin
Reservoir Info (USACE NID)
Brookfield Lake is a man-made reservoir impounded by the Brookfield Dam (completed 1959), built primarily for water supply on the TR WEST YELLOW CREEK; earth-type dam, 43 ft tall and 1,350 ft long.
- Surface area
- 106 ac
- Normal storage
- 1,365 ac-ft
- Max storage
- 1,775 ac-ft
- Drainage area
- 1.03 sq mi
- Hazard class
- High
All listed purposes: Water Supply;Recreation.
Source: USACE National Inventory of Dams, NID ID MO10181 · Operator website
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2024-08-07
Monitoring stations: 1