What is the address of Rock Falls WWTP?

The address on the plant’s EPA facility record is 22498 305th St, Rock Falls, IA 50467, in Cerro Gordo County. Its coordinates are 43.2065, -93.0731. For some plants the record holds the utility’s mailing address rather than the plant gate.

How much wastewater does Rock Falls WWTP treat?

Rock Falls WWTP is permitted for a design flow of 0.02 MGD. Its average daily flow is not available in the current EPA data.

What treatment technology does Rock Falls WWTP use?

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

What is the NPDES permit for Rock Falls WWTP?

The facility discharges under NPDES permit IA0063495, currently effective, expiring December 2028.

Is Rock Falls WWTP in compliance?

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

Who operates Rock Falls WWTP and how do I contact them?

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

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Rock Falls WWTP

22498 305th St, Rock Falls, IA 50467 · Cerro Gordo County · Publicly Owned Treatment Works

Average flow: —

Design flow: 0.02 MGD

NPDES permit: IA0063495; Effective

Permit expires: December 2028

Population served: 150; CWNS 2022

Rock Falls WWTP is a publicly owned wastewater treatment works in Rock Falls, Cerro Gordo County, Iowa, serving about 150 residents. It discharges under NPDES permit IA0063495 (effective), which expires in December 2028, with 0 recorded violations in the last three years.

Treatment technology

One treatment structure or unit process identified at Rock Falls WWTP.

Available with a free Klarifi account

See the full treatment train at Rock Falls 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 Rock Falls WWTP, with validated emails and direct phone numbers.

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

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Nearby wastewater treatment plants in Iowa

Plymouth City Of STP

Plymouth · 4 mi away

0.12 MGD

Nora Springs City Of STP

Nora Springs · 6 mi away

0.13 MGD

Mason WWTP

Mason City · 6 mi away

5.13 MGD

Manly WWTP

Manly · 8 mi away

0.27 MGD

Grafton City Of STP

Grafton · 8 mi away

—

Rudd WWTP

Rudd · 9 mi away

—

Kensett, City Of-STP

Kensett · 12 mi away

—

Mitchell County WW Pretreatment Plant

Osage · 13 mi away

0.03 MGD

Rock Falls 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 · Significant industrial user · WWTP · all terms

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