Manito Lake by Dam
Moniteau County, WisconsinEutrophic
Manito Lake by Dam is a 77-acre productive, nutrient-rich eutrophic lake in Moniteau County, MO. Water quality is graded D based on 3 sampling years through 2024. Compared to the 1 other monitored lakes in Moniteau County, Manito Lake by Dam ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2024-07-15. Grade methodology: LakeGrade methodology.
Swimming Safety
Swimming not recommended, poor water quality with high algae risk
Water Quality Grade: D, Poor
Very murky, less than 2.5 ft of visibility. Phosphorus level: 62 µg/L. Chlorophyll-a: 25.5 µg/L. Trophic State Index: 63.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.5 ft | F |
| Phosphorus | 62 µg/L | D |
| Chlorophyll-a (Algae) | 25.5 µg/L | D |
| Trophic State Index (TSI) | 63 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 77 acres |
Location
County Ranking
Ranked #1 of 2 lakes in Moniteau County
Cleaner Lakes Within 30 Miles
Manito Lake by Dam holds Grade D. 5 nearby lakes hold higher grades.
- BCrystal-Morgan LakeMorgan County · 15.6 mi · Two grade letters higher (D → B)
- BGrav Arm 2 LakeMorgan County · 20.2 mi · Two grade letters higher (D → B)
- CGrav Arm 1 LakeMorgan County · 19.1 mi · Higher grade (D → C)
- CLoto LakeMorgan County · 20.2 mi · Higher grade (D → C)
- CGrav If 4 LakeMorgan County · 20 mi · Higher grade (D → C)
Nearby Lakes in Moniteau County
More Wisconsin Lake Rankings
Other Grade D Lakes in Wisconsin
St. Louis city County · Clarity: 2.3 ft
Shelby County · Clarity: 3.2 ft
Macon County · Clarity: 1.8 ft
Harrison County · Clarity: 1.7 ft
Stone County · Clarity: 2.3 ft
Knox County · Clarity: 2.1 ft
Eutrophic Lakes in Wisconsin
Reservoir Info (USACE NID)
Manito Lake by Dam is a man-made reservoir impounded by the Manito Dam (completed 1984), built primarily for recreation on the LITTLE RICHLAND CREEK; earth-type dam, 43 ft tall and 2,200 ft long.
- Surface area
- 77 ac
- Normal storage
- 918 ac-ft
- Max storage
- 918 ac-ft
- Drainage area
- 2.31 sq mi
- Hazard class
- High
- Owner
- MO DEPT OF CONSERVATION
Source: USACE National Inventory of Dams, NID ID MO31853 · Operator website · Matched by proximity (0.08 km)
EPA Impairment Status
Manito Lake by Dam 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_7198.00 · Official waterbody report · Matched by proximity (0.42 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: 2024-07-15
Monitoring stations: 1