What is the address of Thebes STP?

The address on the plant’s EPA facility record is Route 3, Thebes, IL 62990, in Alexander County. Its coordinates are 37.2279, -89.4423. For some plants the record holds the utility’s mailing address rather than the plant gate.

How much wastewater does Thebes STP treat?

Thebes STP treats an average of 0.01 MGD and is permitted for a design flow of 0.15 MGD.

What treatment technology does Thebes STP use?

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

What is the NPDES permit for Thebes STP?

The facility discharges under NPDES permit ILG580253, currently effective, expiring May 2027.

Is Thebes STP in compliance?

Discharge monitoring reports show 139 violations at Thebes STP in the last three years, 10 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Thebes STP and how do I contact them?

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

Try for free Log in

Thebes STP

Route 3, Thebes, IL 62990 · Alexander County · Publicly Owned Treatment Works

Average flow: 0.01 MGD

Design flow: 0.15 MGD

NPDES permit: ILG580253; Effective

Permit expires: May 2027

Population served: 475; CWNS 2022

Thebes STP is a publicly owned wastewater treatment works in Thebes, Alexander County, Illinois treating an average of 0.01 million gallons per day against a permitted design capacity of 0.15 MGD, serving about 475 residents. It discharges under NPDES permit ILG580253 (effective), which expires in May 2027, with 139 recorded violations in the last three years.

Treatment technology

One treatment structure or unit process identified at Thebes STP.

Available with a free Klarifi account

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

Create a free account

Compliance snapshot (last 3 years)

Total violations: 139

Effluent violations: 10

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

Key contacts

Decision-makers at Thebes STP.

No verified contacts on file yet

Klarifi verifies plant and municipal decision-makers continuously. Start a free trial to browse contacts at nearby plants and flag this one for verification.

Try Klarifi free

Nearby wastewater treatment plants in Illinois

East Cape Girardeau

East Cape Girardeau · 5 mi away

0.008 MGD

Central Alexander County Sd STP

Olive Branch · 7 mi away

0.02 MGD

Tamms WWTP

Tamms · 10 mi away

0.06 MGD

Ullin Stp, Village Of

Ullin · 14 mi away

0.0089 MGD

Ware Sanitary Corporation STP

Ware · 16 mi away

—

Mounds Stp, City Of

Mounds · 16 mi away

0.5 MGD

Jonesboro Stp, City Of

Jonesboro · 16 mi away

0.12 MGD

Dongola Stp, Village Of

Dongola · 18 mi away

—

Thebes 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 November 6, 2025.

Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · FOG · Equalization tank · all terms

Try Klarifi for free

Create your own trial account and explore how Klarifi can help you.

Try for free