What is the address of Massena WWTP?

The address on the plant’s EPA facility record is 100 Main PO Box 109, Massena, IA 50853, in Cass County. Its coordinates are 41.2531, -94.7596. For some plants the record holds the utility’s mailing address rather than the plant gate.

How much wastewater does Massena WWTP treat?

Massena WWTP treats an average of 0.07 MGD and is permitted for a design flow of 0.42 MGD.

What treatment technology does Massena WWTP use?

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

What is the NPDES permit for Massena WWTP?

The facility discharges under NPDES permit IA0048348, currently effective, expiring February 2027.

Is Massena WWTP in compliance?

Discharge monitoring reports show 25 violations at Massena WWTP in the last three years, 25 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Massena WWTP and how do I contact them?

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

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Massena WWTP

100 Main PO Box 109, Massena, IA 50853 · Cass County · Publicly Owned Treatment Works

Average flow: 0.07 MGD

Design flow: 0.42 MGD

NPDES permit: IA0048348; Effective

Permit expires: February 2027

Population served: 359; CWNS 2022

Massena WWTP is a publicly owned wastewater treatment works in Massena, Cass County, Iowa treating an average of 0.07 million gallons per day against a permitted design capacity of 0.42 MGD, serving about 359 residents. It discharges under NPDES permit IA0048348 (effective), which expires in February 2027, with 25 recorded violations in the last three years.

Treatment technology

One treatment structure or unit process identified at Massena WWTP.

Available with a free Klarifi account

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

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Compliance snapshot (last 3 years)

Total violations: 25

Effluent violations: 25

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

Key contacts

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

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

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Massena 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 November 6, 2025.

Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Oxidation ditch · Anaerobic digester · all terms

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