What is the address of Colp Stp, Village Of?

The address on the plant’s EPA facility record is 104 Mayor Caliper Drive, Colp, IL 62921, in Williamson County. Its coordinates are 37.8015, -89.0757. For some plants the record holds the utility’s mailing address rather than the plant gate.

How much wastewater does Colp Stp, Village Of treat?

Colp Stp, Village Of treats an average of 0.01 MGD and is permitted for a design flow of 0.15 MGD.

What treatment technology does Colp Stp, Village Of use?

Klarifi has identified one treatment structure or unit process at the Colp facility. The full treatment train, with exact unit counts, is shown in Klarifi with a free account.

What is the NPDES permit for Colp Stp, Village Of?

The facility discharges under NPDES permit ILG580155, currently effective, expiring May 2027.

Is Colp Stp, Village Of in compliance?

Discharge monitoring reports show 30 violations at Colp Stp, Village Of in the last three years, 30 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Colp Stp, Village Of and how do I contact them?

Colp Stp, Village Of is a publicly owned treatment works in Colp, Illinois. Klarifi lists 1 verified decision-maker contact for this facility, available with a free trial.

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Colp Stp, Village Of

104 Mayor Caliper Drive, Colp, IL 62921 · Williamson County · Publicly Owned Treatment Works

Average flow: 0.01 MGD

Design flow: 0.15 MGD

NPDES permit: ILG580155; Effective

Permit expires: May 2027

Population served: 280; CWNS 2022

Colp Stp, Village Of is a publicly owned wastewater treatment works in Colp, Williamson County, Illinois treating an average of 0.01 million gallons per day against a permitted design capacity of 0.15 MGD, serving about 280 residents. It discharges under NPDES permit ILG580155 (effective), which expires in May 2027, with 30 recorded violations in the last three years.

Treatment technology

One treatment structure or unit process identified at Colp Stp, Village Of.

Available with a free Klarifi account

See the full treatment train at Colp Stp, Village Of: structures, unit processes and planned upgrades, with exact unit counts.

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Compliance snapshot (last 3 years)

Total violations: 30

Effluent violations: 30

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

Key contacts

1 verified contact for Colp Stp, Village Of, with validated emails and direct phone numbers.

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Names, validated emails and direct phone numbers for decision-makers at Colp Stp, Village Of, plus the full compliance history and discharge data.

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Hurst Stp, City Of

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Colp Stp, Village 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 March 28, 2025.

Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Centrate · Ozonation · all terms

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