How much wastewater does Mount Olive North STP treat?

Mount Olive North STP treats an average of 0.1 MGD and is permitted for a design flow of 1.29 MGD.

What is the NPDES permit for Mount Olive North STP?

The facility discharges under NPDES permit IL0036528, currently effective, expiring May 2028.

Is Mount Olive North STP in compliance?

Discharge monitoring reports show 23 violations at Mount Olive North STP in the last three years, 23 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Mount Olive North STP and how do I contact them?

Mount Olive North STP is a publicly owned treatment works in Mount Olive, Illinois. Klarifi lists 2 verified decision-maker contacts for this facility, available with a free trial.

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Mount Olive North STP

Q: What treatment technology does Mount Olive North STP use?

Klarifi has identified clarifiers, aerated lagoons, uncovered lagoons, biogas balloons at the Mount Olive facility.

Mount Olive, IL · Macoupin County · Publicly Owned Treatment Works

Average flow: 0.1 MGD

Design flow: 1.29 MGD

NPDES permit: IL0036528; Effective

Permit expires: May 2028

Population served: 3,060; CWNS 2022

Mount Olive North STP is a publicly owned wastewater treatment works in Mount Olive, Macoupin County, Illinois treating an average of 0.1 million gallons per day against a permitted design capacity of 1.29 MGD, serving about 3,060 residents. Treatment on site includes clarifiers, aerated lagoons, uncovered lagoons, biogas balloons. It discharges under NPDES permit IL0036528 (effective), which expires in May 2028, with 23 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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Aerated lagoons

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Uncovered lagoons

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Biogas balloons

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Compliance snapshot (last 3 years)

Total violations: 23

Effluent violations: 23

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

Key contacts

2 verified contacts for Mount Olive North STP, with validated emails and direct phone numbers.

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

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Mount Olive North 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 3, 2026.

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