MSD Fenton Waste Water Treatment Plant
75 Opps Ln, Fenton, MO 63026 · St Louis County · Publicly Owned Treatment Works
- Average flow
- 4.04 MGD
- Design flow
- —
- NPDES permit
- MO0086126
- Administratively continued
- Permit expires
- December 2022
- Population served
- 21,144
- CWNS 2022
MSD Fenton Waste Water Treatment Plant is a publicly owned wastewater treatment works in Fenton, St Louis County, Missouri treating an average of 4.04 million gallons per day, serving about 21,144 residents. It discharges under NPDES permit MO0086126 (administratively continued), which expires in December 2022, with 0 recorded violations in the last three years. EPA has recorded 1 formal enforcement action naming the plant, the latest in April 2012.
Treatment technology
6 treatment structures and unit processes identified at MSD Fenton Waste Water Treatment Plant.
Available with a free Klarifi account
See the full treatment train at MSD Fenton Waste Water Treatment Plant: structures, unit processes and planned upgrades, with 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.
EPA enforcement history
Federal civil enforcement cases, compliance inspections and informal actions recorded for MSD Fenton Waste Water Treatment Plant in EPA's ICIS system.
- Formal actions
- 1
- 0 since FY2020
- Penalties assessed
- $1.2M
- all cases
- Compliance actions
- $4,700M
- required by EPA orders
- EPA inspections
- 0
- none on record
Latest case · Apr 2012
METROPOLITAN ST LOUIS SEWER DISTRICT; MSD
Judicial case · CWA, NPDES Permit Violations · Final Order With Penalty · Penalty $1.2M · Compliance actions $4,700M · The case also names 3 other plants, and its amounts cover all of them
Source: EPA ECHO, civil enforcement case 07-2003-0343.
Full case history with a free Klarifi account
Every action against MSD Fenton Waste Water Treatment Plant with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Key contacts
Decision-makers at MSD Fenton Waste Water Treatment Plant.
No verified contacts on file yet
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Nearby wastewater treatment plants in Missouri
Fenton · 2 mi away
—
Fenton · 4 mi away
0.0022 MGD
Valley Park · 4 mi away
12.6 MGD
High Ridge · 7 mi away
0.02 MGD
High Ridge · 8 mi away
0.0041 MGD
House Springs · 8 mi away
0.06 MGD
St. Louis · 8 mi away
9.68 MGD
House Springs · 9 mi away
0.005 MGD
MSD Fenton Waste Water Treatment Plant: 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 October 12, 2026; facility record last updated May 20, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Tertiary treatment · Significant industrial user · all terms