Olney Stp, City Of
1001 South Oak Street, Olney, IL 62450 · Richland County · Publicly Owned Treatment Works
- Average flow
- 1.34 MGD
- Design flow
- —
- NPDES permit
- ILL048755
- Effective
- Permit expires
- December 2030
- Population served
- 8,929
- CWNS 2022
Olney Stp, City Of is a publicly owned wastewater treatment works in Olney, Richland County, Illinois treating an average of 1.34 million gallons per day, serving about 8,929 residents. It discharges under NPDES permit ILL048755 (effective), which expires in December 2030, with 33 recorded violations in the last three years.
Treatment technology
7 treatment structures and unit processes identified, 1 planned upgrade on record at Olney Stp, City Of.
Available with a free Klarifi account
See the full treatment train at Olney Stp, City Of: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 33
- Effluent violations
- 33
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
2 verified contacts for Olney Stp, City Of, with validated emails and direct phone numbers.
Unlock 2 verified contacts
Names, validated emails and direct phone numbers for decision-makers at Olney Stp, City Of, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Illinois
Calhoun · 6 mi away
0.02 MGD
Noble · 7 mi away
0.0034 MGD
Claremont · 7 mi away
0.0057 MGD
Dundas · 8 mi away
0.15 MGD
Parkersburg · 9 mi away
0.01 MGD
Sumner · 13 mi away
0.07 MGD
Clay City · 14 mi away
0.19 MGD
Sainte Marie · 15 mi away
0.05 MGD
Olney Stp, City 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 September 14, 2026.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Centrate · Ozonation · all terms