Harrisonville Lake
Cass County, WisconsinHypereutrophic
Harrisonville Lake is a 398-acre highly nutrient-loaded hypereutrophic lake in Cass County, MO. Water quality is graded F based on 3 sampling years through 2023. Compared to the 4 other monitored lakes in Cass County, Harrisonville Lake ranks #3 for water quality.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2023-07-28. 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 1.1 ft of visibility. Phosphorus level: 69 µg/L. Chlorophyll-a: 66 µg/L. Trophic State Index: 71.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.1 ft | F |
| Phosphorus | 69 µg/L | D |
| Chlorophyll-a (Algae) | 66 µg/L | F |
| Trophic State Index (TSI) | 71 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 398 acres |
Location
County Ranking
Ranked #3 of 5 lakes in Cass County
Nearby Lakes in Cass County
More Wisconsin Lake Rankings
Other Grade F Lakes in Wisconsin
St. Louis County · Clarity: 1.6 ft
Jackson County · Clarity: 2 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
Hypereutrophic Lakes in Wisconsin
Reservoir Info (USACE NID)
Harrisonville Lake is a man-made reservoir impounded by the Harrisonville City Lake Dam (completed 1971), built primarily for recreation on the TR MIDDLE BIG CREEK; earth-type dam, 55 ft tall and 1,900 ft long.
- Surface area
- 398 ac
- Normal storage
- 11,275 ac-ft
- Max storage
- 13,520 ac-ft
- Drainage area
- 14.8 sq mi
- Hazard class
- High
- Owner
- CITY OF HARRISONVILLE
All listed purposes: Recreation;Water Supply.
Source: USACE National Inventory of Dams, NID ID MO20077 · Operator website · Matched by proximity (0.29 km)
EPA Impairment Status
Harrisonville 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_7214.00 · Official waterbody report · Matched by proximity (1.38 km)
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: 2023-07-28
Monitoring stations: 1