How much wastewater does Charter Oak City Of STP treat?

Charter Oak City Of STP is permitted for a design flow of 0.09 MGD. Its average daily flow is not available in the current EPA data.

What treatment technology does Charter Oak City Of STP use?

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

What is the NPDES permit for Charter Oak City Of STP?

The facility discharges under NPDES permit IA0022268, currently effective, expiring September 2029.

Is Charter Oak City Of STP in compliance?

Discharge monitoring reports show no violations at Charter Oak City Of STP in the last three years.

Who operates Charter Oak City Of STP and how do I contact them?

Charter Oak City Of STP is a publicly owned treatment works in Charter Oak, Iowa. Klarifi lists 1 verified decision-maker contact for this facility, available with a free trial.

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Charter Oak City Of STP

Charter Oak, IA 51439 · Crawford County · Publicly Owned Treatment Works

Average flow: —

Design flow: 0.09 MGD

NPDES permit: IA0022268; Effective

Permit expires: September 2029

Population served: 535; CWNS 2022

Charter Oak City Of STP is a publicly owned wastewater treatment works in Charter Oak, Crawford County, Iowa, serving about 535 residents. It discharges under NPDES permit IA0022268 (effective), which expires in September 2029, with 0 recorded violations in the last three years.

Treatment technology

One treatment structure or unit process identified at Charter Oak City Of STP.

Available with a free Klarifi account

See the full treatment train at Charter Oak City Of STP: 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 Charter Oak City Of STP, with validated emails and direct phone numbers.

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Names, validated emails and direct phone numbers for decision-makers at Charter Oak City Of STP, plus the full compliance history and discharge data.

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Nearby wastewater treatment plants in Iowa

Ricketts City Of STP

Ricketts · 4 mi away

0.0015 MGD

Ute City Of STP

Ute · 6 mi away

—

Schleswig City Of STP

Schleswig · 11 mi away

0.1 MGD

Dow City, City Of STP

Dow City · 11 mi away

—

Soldier City Of STP

Soldier · 11 mi away

—

Denison Municipal Utilities WWTP

Denison · 12 mi away

0.84 MGD

Mapleton City Of STP

Mapleton · 12 mi away

0.11 MGD

Danbury City Of STP

Danbury · 13 mi away

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Charter Oak City Of 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 October 26, 2026; facility record last updated August 10, 2026.

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

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