Effingham STP
Effingham, IL 62401 · Effingham County · Publicly Owned Treatment Works
- Average flow
- 2.21 MGD
- Design flow
- —
- NPDES permit
- ILL028622
- Effective
- Permit expires
- December 2030
- Population served
- 12,601
- CWNS 2022
Effingham STP is a publicly owned wastewater treatment works in Effingham, Effingham County, Illinois treating an average of 2.21 million gallons per day, serving about 12,601 residents. It discharges under NPDES permit ILL028622 (effective), which expires in December 2030, with 51 recorded violations in the last three years. EPA has recorded 2 formal enforcement actions naming the plant, the latest in October 2019.
Treatment technology
8 treatment structures and unit processes identified at Effingham STP.
Available with a free Klarifi account
See the full treatment train at Effingham STP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 51
- Effluent violations
- 18
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 Effingham STP in EPA's ICIS system.
- Formal actions
- 2
- 0 since FY2020
- Compliance actions
- $962
- required by EPA orders
- EPA inspections
- 1
- none on record
Latest case · Oct 2019
City of Effingham
Administrative order · CWA, NPDES Permit Violations · Final Order No Penalty · Compliance actions $962
Source: EPA ECHO, civil enforcement case 05-2018-0327.
Full case history with a free Klarifi account
Every action against Effingham STP with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Key contacts
1 verified contact for Effingham STP, with validated emails and direct phone numbers.
Unlock 1 verified contact
Names, validated emails and direct phone numbers for decision-makers at Effingham STP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Illinois
Teutopolis · 4 mi away
0.3 MGD
Watson · 6 mi away
0.08 MGD
Shumway · 8 mi away
0.05 MGD
Sigel · 8 mi away
0.05 MGD
Montrose · 10 mi away
0.03 MGD
Dieterich · 10 mi away
0.15 MGD
Mason · 11 mi away
0.09 MGD
Stewardson · 11 mi away
0.11 MGD
Effingham STP: 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 February 15, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Anaerobic digester · Lift station · all terms