What is the address of Union WWTP?

The address on the plant’s EPA facility record is Railroad St SE Corner Of Town, Union, IA 50258, in Hardin County. Its coordinates are 42.2360, -93.0526. For some plants the record holds the utility’s mailing address rather than the plant gate.

What treatment technology does Union WWTP use?

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

What is the NPDES permit for Union WWTP?

The facility discharges under NPDES permit IA0034266, currently effective, expiring May 2031.

Is Union WWTP in compliance?

Discharge monitoring reports show no violations at Union WWTP in the last three years.

Who operates Union WWTP and how do I contact them?

Union WWTP is a publicly owned treatment works in Union, Iowa. Klarifi lists 1 verified decision-maker contact for this facility, available with a free trial.

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Union WWTP

Railroad St SE Corner Of Town, Union, IA 50258 · Hardin County · Publicly Owned Treatment Works

Average flow: —

Design flow: —

NPDES permit: IA0034266; Effective

Permit expires: May 2031

Population served: 399; CWNS 2022

Union WWTP is a publicly owned wastewater treatment works in Union, Hardin County, Iowa, serving about 399 residents. It discharges under NPDES permit IA0034266 (effective), which expires in May 2031, with 0 recorded violations in the last three years.

Treatment technology

One treatment structure or unit process identified at Union WWTP.

Available with a free Klarifi account

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

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Compliance snapshot (last 3 years)

Total violations: 0

Effluent violations: 0

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

Key contacts

1 verified contact for Union WWTP, with validated emails and direct phone numbers.

Unlock 1 verified contact

Names, validated emails and direct phone numbers for decision-makers at Union WWTP, plus the full compliance history and discharge data.

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Union WWTP: 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 April 23, 2025.

Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Centrate · Ozonation · all terms

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