Stockton State Park Marina Lake is a mesotrophic lake in Cedar County, Missouri. Water quality is graded B based on 3 sampling years through 2023. Limited fish-species data available. Public access is available with 3 public boat landings. Compared to the 3 other monitored lakes in Cedar County, Stockton State Park Marina Lake ranks #4 for water quality.
Source: EPA Water Quality Portal sampling records, Missouri DNR, last sampled 2023-05-25. Grade methodology: LakeGrade methodology.
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Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
Murky, only visible to about 5.9 ft. Phosphorus level: 13 µg/L. Chlorophyll-a: 7.1 µg/L. Trophic State Index: 47.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 5.9 ft | D |
| Phosphorus | 13 µg/L | A |
| Chlorophyll-a (Algae) | 7.1 µg/L | B |
| Trophic State Index (TSI) | 47 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Stockton State Park Marina Lake
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Fishing Stockton State Park Marina Lake
Recreation & Access
Location
County Ranking
Ranked #4 of 4 lakes in Cedar County
Cleaner Lakes Within 30 Miles
Stockton State Park Marina Lake holds Grade B. One nearby lake has a higher grade.
See full comparison →Nearby Lakes in Cedar County
Explore Stockton State Park Marina Lake across LakeGrade
More Missouri Lake Rankings
Other Grade B Lakes in Missouri
Greene County · Clarity: 7.2 ft
Greene County · Clarity: 4.2 ft
Stone County · Clarity: 4.4 ft
Stone County · Clarity: 4.3 ft
Stone County · Clarity: 6 ft
Stone County · Clarity: 4.9 ft
Mesotrophic 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
1 EPA-permitted facility operate within about 5 miles of Stockton State Park Marina Lake under Clean Water Act (NPDES) discharge permits. 1 facility has a reported Clean Water Act violation in the past three years.
- Mdnr Stockton State ParkDadeville · 0.6 mi away · NPDES MO0095893Recent violation
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: 2023-05-25
Monitoring stations: 1