What is the address of Cowden STP?

The address on the plant’s EPA facility record is Christie Street East Of Grand, Cowden, IL 62422, in Shelby County. Its coordinates are 39.2432, -88.8580. For some plants the record holds the utility’s mailing address rather than the plant gate.

How much wastewater does Cowden STP treat?

Cowden STP is permitted for a design flow of 0.75 MGD. Its average daily flow is not available in the current EPA data.

What treatment technology does Cowden STP use?

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

What is the NPDES permit for Cowden STP?

The facility discharges under NPDES permit IL0028231, currently effective, expiring August 2028.

Is Cowden STP in compliance?

Discharge monitoring reports show 67 violations at Cowden STP in the last three years, 67 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Cowden STP and how do I contact them?

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

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Cowden STP

Christie Street East Of Grand, Cowden, IL 62422 · Shelby County · Publicly Owned Treatment Works

Average flow: —

Design flow: 0.75 MGD

NPDES permit: IL0028231; Effective

Permit expires: August 2028

Population served: 472; CWNS 2022

Cowden STP is a publicly owned wastewater treatment works in Cowden, Shelby County, Illinois, serving about 472 residents. It discharges under NPDES permit IL0028231 (effective), which expires in August 2028, with 67 recorded violations in the last three years.

Treatment technology

One treatment structure or unit process identified at Cowden STP.

Available with a free Klarifi account

See the full treatment train at Cowden STP: structures, unit processes and planned upgrades, with exact unit counts.

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Compliance snapshot (last 3 years)

Total violations: 67

Effluent violations: 67

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

Key contacts

Decision-makers at Cowden STP.

No verified contacts on file yet

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Nearby wastewater treatment plants in Illinois

Herrick Stp, Village Of

Herrick · 6 mi away

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Tower Hill Stp, Village Of

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Shelbyville Stw, City Of

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Shumway Collection & Treatment Facility

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Stewardson Stp, Village Of

Stewardson · 12 mi away

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Pana STP

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Altamont North Stp, City Of

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Strasburg Stp, Village Of

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Cowden 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 October 26, 2026; facility record last updated March 7, 2025.

Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Tertiary treatment · Significant industrial user · all terms

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