Sanitary District Of Decatur
Decatur, IL · Macon County · Publicly Owned Treatment Works
- Average flow
- 26.53 MGD
- Design flow
- —
- NPDES permit
- ILL028321
- Effective
- Permit expires
- December 2030
- Population served
- 78,304
- CWNS 2022
Sanitary District Of Decatur is a publicly owned wastewater treatment plant in Decatur, Macon County, Illinois treating an average of 26.53 million gallons per day, serving about 78,304 residents. Treatment on site includes clarifiers, biogas silos, biogas balloons. It discharges under NPDES permit ILL028321 (effective), which expires in December 2030, with 1 recorded violation in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Compliance snapshot (last 3 years)
- Total violations
- 1
- Effluent violations
- 1
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
8 verified contacts for Sanitary District Of Decatur, with validated emails and direct phone numbers.
Unlock 8 verified contacts (5 more than shown)
Names, validated emails and direct phone numbers for decision-makers at Sanitary District Of Decatur, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Illinois
Harristown · 5 mi away
0.04 MGD
Macon · 8 mi away
—
Warrensburg · 8 mi away
0.03 MGD
Niantic · 8 mi away
0.03 MGD
Blue Mound · 11 mi away
0.03 MGD
Illiopolis · 12 mi away
0.07 MGD
Maroa · 14 mi away
0.06 MGD
Cerro Gordo · 15 mi away
0.6 MGD
Sanitary District Of Decatur: 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 March 4, 2025.