Swansea Stp, Village Of
215 Service Street, Swansea, IL 62226 · St. Clair County · Publicly Owned Treatment Works
- Average flow
- 1.81 MGD
- Design flow
- 11.89 MGD
- NPDES permit
- IL0021181
- Effective
- Permit expires
- March 2031
- Population served
- 13,543
- CWNS 2022
Swansea Stp, Village Of is a publicly owned wastewater treatment works in Swansea, St. Clair County, Illinois treating an average of 1.81 million gallons per day against a permitted design capacity of 11.89 MGD, serving about 13,543 residents. It discharges under NPDES permit IL0021181 (effective), which expires in March 2031, with 2 recorded violations in the last three years. EPA has recorded 1 formal enforcement action naming the plant, the latest in April 2013.
Treatment technology
One treatment structure or unit process identified at Swansea Stp, Village Of.
Available with a free Klarifi account
See the full treatment train at Swansea Stp, Village Of: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 2
- Effluent violations
- 1
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 Swansea Stp, Village Of in EPA's ICIS system.
- Formal actions
- 1
- 0 since FY2020
- EPA inspections
- 0
- none on record
Latest case · Apr 2013
Village of Swansea
Administrative order · CWA, NPDES Permit Violations · Final Order No Penalty
EPA's description of the case:
“Violations of NPDES phosphorus permit limitations from 1/11 - 3/11 & 5/11 - 7/11. There is no complying cost associated with this action. It is a newer waste water treatment plant that had to work…”
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Source: EPA ECHO, civil enforcement case 05-2012-0303.
Full case history with a free Klarifi account
Every action against Swansea Stp, Village Of with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Key contacts
1 verified contact for Swansea Stp, Village Of, with validated emails and direct phone numbers.
Unlock 1 verified contact
Names, validated emails and direct phone numbers for decision-makers at Swansea Stp, Village Of, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Illinois
Belleville · 2 mi away
1.08 MGD
Belleville · 4 mi away
0.94 MGD
O Fallon · 5 mi away
2.36 MGD
O Fallon · 5 mi away
0.49 MGD
Millstadt · 8 mi away
0.34 MGD
Freeburg · 8 mi away
0.33 MGD
Smithton · 8 mi away
0.37 MGD
O Fallon · 8 mi away
2.57 MGD
Swansea Stp, Village Of: 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 26, 2026; facility record last updated August 3, 2026.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Filter press · FOG · all terms