Marshall SE WWTP
Marshall, MO · Saline County · Publicly Owned Treatment Works
- Average flow
- 2.22 MGD
- Design flow
- 7.1 MGD
- NPDES permit
- MO0032883
- Effective
- Permit expires
- March 2022
- Population served
- 12,920
- CWNS 2022
Marshall SE WWTP is a publicly owned wastewater treatment works in Marshall, Saline County, Missouri treating an average of 2.22 million gallons per day against a permitted design capacity of 7.1 MGD, serving about 12,920 residents. Treatment on site includes clarifiers, uncovered lagoons, biological treatment, other, biosolids aerobic digestion, biosolids chemical addition and other unit processes. It discharges under NPDES permit MO0032883 (effective), which expires in March 2022, with 0 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Clarifiers
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Uncovered lagoons
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Biological Treatment, Other
unit processBiosolids Aerobic Digestion
unit processBiosolids Chemical Addition
unit processDisinfection, UV
unit processFlow Equalization
unit processScreening
unit processUnlock exact unit counts →
Compliance snapshot (last 3 years)
- Total violations
- 0
- Effluent violations
- 0
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Marshall SE WWTP.
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Nearby wastewater treatment plants in Missouri
Slater · 11 mi away
0.19 MGD
Sweet Springs · 17 mi away
—
Houstonia · 17 mi away
0.009 MGD
Blackburn · 18 mi away
0.01 MGD
Glasgow · 18 mi away
—
Emma · 19 mi away
0.009 MGD
Alma · 20 mi away
0.01 MGD
Waverly · 20 mi away
0.08 MGD
Marshall SE WWTP: frequently asked questions
Sources and methodology
Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.
Data refreshed September 11, 2026; facility record last updated April 5, 2025.