What is the address of St Marie STP?

The address on the plant’s EPA facility record is PO Box 57, Sainte Marie, IL 62459, in Jasper County. Its coordinates are 38.9239, -88.0201. For some plants the record holds the utility’s mailing address rather than the plant gate.

How much wastewater does St Marie STP treat?

St Marie STP treats an average of 0.05 MGD and is permitted for a design flow of 0.11 MGD.

What treatment technology does St Marie STP use?

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

What is the NPDES permit for St Marie STP?

The facility discharges under NPDES permit ILG580058, currently effective, expiring May 2027.

Is St Marie STP in compliance?

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

Who operates St Marie STP and how do I contact them?

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

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St Marie STP

PO Box 57, Sainte Marie, IL 62459 · Jasper County · Publicly Owned Treatment Works

Average flow: 0.05 MGD

Design flow: 0.11 MGD

NPDES permit: ILG580058; Effective

Permit expires: May 2027

Population served: 341; CWNS 2022

St Marie STP is a publicly owned wastewater treatment works in Sainte Marie, Jasper County, Illinois treating an average of 0.05 million gallons per day against a permitted design capacity of 0.11 MGD, serving about 341 residents. It discharges under NPDES permit ILG580058 (effective), which expires in May 2027, with 10 recorded violations in the last three years.

Treatment technology

One treatment structure or unit process identified at St Marie STP.

Available with a free Klarifi account

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

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Compliance snapshot (last 3 years)

Total violations: 10

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 St Marie STP.

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Nearby wastewater treatment plants in Illinois

Willow Hill Stp, Village Of

Willow Hill · 5 mi away

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West Liberty - Dundas STP

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Oblong Stp, Village Of

Oblong · 9 mi away

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Newton Stw

Newton · 9 mi away

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Claremont Stp, Village Of

Claremont · 15 mi away

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Olney Stp, City Of

Olney · 15 mi away

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Sumner STP

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Robinson Wwtp, City Of

Robinson · 17 mi away

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St Marie 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 September 25, 2026.

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

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