Loto Lake is a productive, nutrient-rich eutrophic lake in Morgan County, Missouri. Water quality is graded D based on 3 sampling years through 2023. Limited fish-species data available. Public access is available with 1 public boat landing. Compared to the 37 other monitored lakes in Morgan County, Loto Lake ranks #37 for water quality.
Source: EPA Water Quality Portal sampling records, Missouri DNR, last sampled 2023-06-15. Grade methodology: LakeGrade methodology.
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Swimming Safety
Swimming not recommended, poor water quality with high algae risk
Water Quality Grade: D, Poor
Very murky, less than 3 ft of visibility. Phosphorus level: 43 µg/L. Chlorophyll-a: 32 µg/L. Trophic State Index: 61.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3 ft | F |
| Phosphorus | 43 µg/L | C |
| Chlorophyll-a (Algae) | 32 µg/L | F |
| Trophic State Index (TSI) | 61 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Loto Lake
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Fishing Loto Lake
Recreation & Access
Location
County Ranking
Ranked #37 of 38 lakes in Morgan County
Cleaner Lakes Within 30 Miles
Loto Lake holds Grade D. 2 nearby lakes hold higher grades.
- BLoto Confluence of Gravois And Indian Creek LakeMorgan County · 3.4 mi · Two grade letters higher (D → B)
- CLoto LakeMorgan County · 3.3 mi · Higher grade (D → C)
Nearby Lakes in Morgan County
Explore Loto Lake across LakeGrade
Species activity outlook by water temperature and season
Top lakes and where to stay in the Lake of the Ozarks area
Where to stay at Missouri's top lakes, each with its grade
High nutrients, frequent algae, reduced clarity
Missouri's cleanest and most-polluted lakes, ranked
More Missouri Lake Rankings
Other Grade D Lakes in Missouri
More records, surveys & data sources
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth is a modeled estimate.
Regulated Pollution Sources Nearby
3 EPA-permitted facilities operate within about 5 miles of Loto Lake under Clean Water Act (NPDES) discharge permits. 1 facility has a reported Clean Water Act violation in the past three years.
- Gravois Arm Wwtp #2Gravois Mills · 0.3 mi away · NPDES MO0134821Recent violation
- Gravois Arm Sewer District #1Gravois Mills · 0.6 mi away · NPDES MO0131822
- Oak Ridge CourtVersailles · 2.8 mi away · NPDES MO0113425
Facilities permitted to discharge under the Clean Water Act within ~5 miles; proximity does not by itself mean a facility affects this lake. Source: EPA ECHO (ICIS-NPDES), as of 2026-07.
Data Sources
Water quality data from the EPA Water Quality Portal
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Lake size & watershed from HydroLAKES (HydroSHEDS)
Grading methodology based on Metropolitan Council standards
Public boat-access points from the USGS National Boat Ramps inventory
Most recent sample: 2023-06-15
Monitoring stations: 1