What is the address of Coralville WWTP?

The address on the plant’s EPA facility record is Camp Cardinal Ave, Coralville, IA 52241, in Johnson County. Its coordinates are 41.6792, -91.5988. For some plants the record holds the utility’s mailing address rather than the plant gate.

How much wastewater does Coralville WWTP treat?

Coralville WWTP treats an average of 2.98 MGD and is permitted for a design flow of 22.56 MGD.

What treatment technology does Coralville WWTP use?

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

What is the NPDES permit for Coralville WWTP?

The facility discharges under NPDES permit IA0020788, currently effective, expiring September 2031.

Is Coralville WWTP in compliance?

Discharge monitoring reports show 1 violation at Coralville WWTP in the last three years, 1 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Coralville WWTP and how do I contact them?

Coralville WWTP is a publicly owned treatment works in Coralville, Iowa. Klarifi lists decision-maker contacts for this facility, available with a free trial.

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Coralville WWTP

Camp Cardinal Ave, Coralville, IA 52241 · Johnson County · Publicly Owned Treatment Works

Average flow: 2.98 MGD

Design flow: 22.56 MGD

NPDES permit: IA0020788; Effective

Permit expires: September 2031

Population served: 20,178; CWNS 2022

Coralville WWTP is a publicly owned wastewater treatment works in Coralville, Johnson County, Iowa treating an average of 2.98 million gallons per day against a permitted design capacity of 22.56 MGD, serving about 20,178 residents. It discharges under NPDES permit IA0020788 (effective), which expires in September 2031, with 1 recorded violation in the last three years.

Treatment technology

2 treatment structures and unit processes identified at Coralville WWTP.

Available with a free Klarifi account

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

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Compliance snapshot (last 3 years)

Total violations: 1

Effluent violations: 1

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

Key contacts

Decision-makers at Coralville WWTP.

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Nearby wastewater treatment plants in Iowa

North Liberty WWTP

North Liberty · 3 mi away

2.03 MGD

Tiffin WWTP

Tiffin · 4 mi away

0.52 MGD

Iowa City, City Of (south) STP

Iowa City · 7 mi away

8.98 MGD

Hills, City Of WWTF

Hills · 10 mi away

0.16 MGD

Oxford City Of STP

Oxford · 10 mi away

0.12 MGD

City Of Solen Treatment Plant

Solon · 10 mi away

0.49 MGD

Swisher WWTP

Swisher · 12 mi away

0.12 MGD

Ely City Of STP

Ely · 13 mi away

0.17 MGD

Coralville 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 September 11, 2026.

Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Biosolids · Filter press · all terms

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