Montrose Lake
Henry County, WisconsinHypereutrophic
Montrose Lake is a 1,700-acre highly nutrient-loaded hypereutrophic lake in Henry County, MO. Water quality is graded F based on 3 sampling years through 2022.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2022-08-16. 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 0.6 ft of visibility. Phosphorus level: 266 µg/L. Chlorophyll-a: 61.9 µg/L. Trophic State Index: 80.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 0.6 ft | F |
| Phosphorus | 266 µg/L | F |
| Chlorophyll-a (Algae) | 61.9 µg/L | F |
| Trophic State Index (TSI) | 80 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 1.7K acres |
Location
County Ranking
Ranked #1 of 1 lakes in Henry County
Cleaner Lakes Within 30 Miles
Montrose Lake holds Grade F. 2 nearby lakes hold higher grades.
- CH.S. Truman Res. Nr. Dam LakeBenton County · 28 mi · Two grade letters higher (F → C)
- DAtkinson Lake by Sw 1401 RdSt. Clair County · 21.9 mi · Higher grade (F → D)
Nearby Lakes in Henry 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)
Montrose Lake is a man-made reservoir impounded by the Montrose Lake Dam (completed 1955), built primarily for recreation on the DEEPWATER CREEK; earth-type dam, 33 ft tall.
- Surface area
- 1,700 ac
- Normal storage
- 11,000 ac-ft
- Max storage
- 30,014 ac-ft
- Drainage area
- 91,000 sq mi
- Hazard class
- Low
- Owner
- KANSAS CITY POWER & LITE
All listed purposes: Recreation;Water Supply.
Source: USACE National Inventory of Dams, NID ID MO20151 · Operator website
EPA Impairment Status
Montrose 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_7208.00 · 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: 2022-08-16
Monitoring stations: 1