How much wastewater does Spring Creek STP treat?

Spring Creek STP treats an average of 7.59 MGD.

What treatment technology does Spring Creek STP use?

Klarifi has identified clarifiers, uncovered lagoons, biogas silos at the Springfield facility.

What is the NPDES permit for Spring Creek STP?

The facility discharges under NPDES permit ILL021989, currently effective, expiring December 2030.

Is Spring Creek STP in compliance?

Discharge monitoring reports show 28 violations at Spring Creek STP in the last three years, 28 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Spring Creek STP and how do I contact them?

Spring Creek STP is a publicly owned treatment works in Springfield, Illinois. Klarifi lists 14 verified decision-maker contacts for this facility, available with a free trial.

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Spring Creek STP

Springfield, IL · Sangamon County · Publicly Owned Treatment Works

Average flow: 7.59 MGD

Design flow: —

NPDES permit: ILL021989; Effective

Permit expires: December 2030

Population served: 106,720; CWNS 2022

Spring Creek STP is a publicly owned wastewater treatment works in Springfield, Sangamon County, Illinois treating an average of 7.59 million gallons per day, serving about 106,720 residents. Treatment on site includes clarifiers, uncovered lagoons, biogas silos. It discharges under NPDES permit ILL021989 (effective), which expires in December 2030, with 28 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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Biogas silos

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Compliance snapshot (last 3 years)

Total violations: 28

Effluent violations: 28

Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.

Key contacts

14 verified contacts for Spring Creek STP, with validated emails and direct phone numbers.

Unlock 14 verified contacts (11 more than shown)

Names, validated emails and direct phone numbers for decision-makers at Spring Creek STP, plus the full compliance history and discharge data.

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Spring Creek 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 September 11, 2026; facility record last updated August 14, 2026.

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