Washington STP #2
Washington, IL · Tazewell County · Publicly Owned Treatment Works
- Average flow
- 1.13 MGD
- Design flow
- 6.37 MGD
- NPDES permit
- IL0042412
- Effective
- Permit expires
- October 2030
- Population served
- 13,268
- CWNS 2022
Washington STP #2 is a publicly owned wastewater treatment works in Washington, Tazewell County, Illinois treating an average of 1.13 million gallons per day against a permitted design capacity of 6.37 MGD, serving about 13,268 residents. Treatment on site includes clarifiers, uncovered lagoons, carrousels / oxidation ditches. It discharges under NPDES permit IL0042412 (effective), which expires in October 2030, with 0 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Clarifiers
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Uncovered lagoons
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Carrousels / oxidation ditches
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Compliance snapshot (last 3 years)
- Total violations
- 0
- Effluent violations
- 0
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
1 verified contact for Washington STP #2, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Washington STP #2, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Illinois
Morton · 3 mi away
0.62 MGD
East Peoria · 4 mi away
0.32 MGD
Metamora · 5 mi away
0.07 MGD
Deer Creek · 7 mi away
0.08 MGD
East Peoria · 8 mi away
2.25 MGD
Morton · 8 mi away
2.11 MGD
Metamora · 9 mi away
0.09 MGD
Metamora · 9 mi away
0.25 MGD
Washington STP #2: 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 29, 2025.