Alton Waste Water Treatment Plant
19 Chessen Lane, Alton, IL 62002 · Madison County · Publicly Owned Treatment Works
- Average flow
- 7.8 MGD
- Design flow
- —
- NPDES permit
- ILL027464
- Effective
- Permit expires
- December 2030
- Population served
- —
- CWNS 2022
Alton Waste Water Treatment Plant is a publicly owned wastewater treatment works in Alton, Madison County, Illinois treating an average of 7.8 million gallons per day. It discharges under NPDES permit ILL027464 (effective), which expires in December 2030, with 40 recorded violations in the last three years. EPA has recorded 1 formal enforcement action naming the plant, the latest in November 2016.
Treatment technology
One treatment structure or unit process identified at Alton Waste Water Treatment Plant.
Available with a free Klarifi account
See the full treatment train at Alton Waste Water Treatment Plant: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 40
- Effluent violations
- 19
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 Alton Waste Water Treatment Plant in EPA's ICIS system.
- Formal actions
- 1
- 0 since FY2020
- Compliance actions
- $3M
- required by EPA orders
- EPA inspections
- 0
- none on record
Latest case · Nov 2016
Village of Godfrey
Administrative order · CWA, NPDES Permit Violations · Final Order No Penalty · Compliance actions $3M · The case also names 1 other plant, and its amounts cover all of them
EPA's description of the case:
“AO to mitigate Chronic SSOs”
Source: EPA ECHO, civil enforcement case 05-2015-0308.
Full case history with a free Klarifi account
Every action against Alton Waste Water Treatment Plant with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Key contacts
1 verified contact for Alton Waste Water Treatment Plant, with validated emails and direct phone numbers.
Unlock 1 verified contact
Names, validated emails and direct phone numbers for decision-makers at Alton Waste Water Treatment Plant, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Illinois
East Alton · 1 mi away
0.59 MGD
Roxana · 6 mi away
0.18 MGD
Godfrey · 7 mi away
0.92 MGD
Edwardsville · 7 mi away
3.11 MGD
Edwardsville · 10 mi away
0.19 MGD
Brighton · 11 mi away
0.54 MGD
Bunker Hill · 14 mi away
0.27 MGD
Hamel · 15 mi away
0.08 MGD
Alton 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 26, 2026; facility record last updated March 2, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · FOG · Equalization tank · all terms