Bates County, Missouri · Water Quality Report Card
Drexel City Reservoir South
Drexel City Reservoir South in Bates County, Missouri has a water quality grade of F (Very Poor). Water clarity: 0.9 ft visibility. Phosphorus: 194 µg/L. Chlorophyll-a (algae): 152.7 µg/L.
- Clarity
- 0.9 ft
- Mean depth
- ~6 ft est.
- Type
- Hypereutrophic
Drexel City Reservoir South is a highly nutrient-loaded hypereutrophic lake in Bates County, Missouri with an estimated average depth of about 6 feet. Water quality is graded F based on 2 sampling years through 2020.
Source: EPA Water Quality Portal sampling records, Missouri DNR, last sampled 2020-08-18. Grade methodology: LakeGrade methodology.
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Swimming Safety
Avoid swimming, very poor water quality, potential algae toxins
Water Quality Grade: F (Very Poor)
Very murky, less than 0.9 ft of visibility. Phosphorus level: 194 µg/L. Chlorophyll-a: 152.7 µg/L. Trophic State Index: 80.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 0.9 ft | |
| Phosphorus | 194 µg/L | Poor |
| Chlorophyll-a (Algae) | 152.7 µg/L | Poor |
| Trophic State Index (TSI) | 80 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Lake Details
| Characteristic | Value |
|---|---|
| Average Depth | ~6 ft est. |
Depth marked “est.” is a modeled estimate from HydroLAKES, not a measured survey. Missouri has not published bathymetry for Drexel City Reservoir South.
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Fishing Drexel City Reservoir South
Location
County Ranking
Ranked #1 of 1 lakes in Bates County
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EPA Impairment Status
Drexel City Reservoir South 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_7230.00 · Official waterbody report
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
Where this data comes from
20 measurements from 1 monitoring station, 2020. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Univ. of Missouri, Columbia
UMC20 samples · 2020
Analytical methods
- Depth, Secchi disk in meters
- 4500 P E ~ Phosphorus in Water by Colorimetry- Ascorbic Acid Method
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
Monitoring station identifiers (1)
Grade thresholds come from the U.S. EPA National Lakes Assessment 2022 Technical Support Document (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated.
Data Sources
Water quality data from the EPA Water Quality Portal
Impairment status from EPA ATTAINS 303(d) database
Lake size & watershed from HydroLAKES (HydroSHEDS)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion
Most recent sample: 2020-08-18
Monitoring stations: 1