What is the address of Henry Stp, City Of?

The address on the plant’s EPA facility record is 1545 County Road 1450 North, Henry, IL 61537, in Marshall County. Its coordinates are 41.1321, -89.3411. For some plants the record holds the utility’s mailing address rather than the plant gate.

How much wastewater does Henry Stp, City Of treat?

Henry Stp, City Of treats an average of 0.31 MGD and is permitted for a design flow of 0.75 MGD.

What treatment technology does Henry Stp, City Of use?

Klarifi has identified 2 treatment structures and unit processes at the Henry facility. The full treatment train, with exact unit counts, is shown in Klarifi with a free account.

What is the NPDES permit for Henry Stp, City Of?

The facility discharges under NPDES permit IL0070548, currently effective, expiring March 2028.

Is Henry Stp, City Of in compliance?

Discharge monitoring reports show 10 violations at Henry Stp, City Of in the last three years, 10 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Henry Stp, City Of and how do I contact them?

Henry Stp, City Of is a publicly owned treatment works in Henry, Illinois. Klarifi lists decision-maker contacts for this facility, available with a free trial.

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Henry Stp, City Of

1545 County Road 1450 North, Henry, IL 61537 · Marshall County · Publicly Owned Treatment Works

Average flow: 0.31 MGD

Design flow: 0.75 MGD

NPDES permit: IL0070548; Effective

Permit expires: March 2028

Population served: 996; CWNS 2022

Henry Stp, City Of is a publicly owned wastewater treatment works in Henry, Marshall County, Illinois treating an average of 0.31 million gallons per day against a permitted design capacity of 0.75 MGD, serving about 996 residents. It discharges under NPDES permit IL0070548 (effective), which expires in March 2028, with 10 recorded violations in the last three years.

Treatment technology

2 treatment structures and unit processes identified at Henry Stp, City Of.

Available with a free Klarifi account

See the full treatment train at Henry Stp, City Of: 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 Henry Stp, City Of.

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Henry Stp, City 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 November 8, 2025.

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

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