What is the address of Kalona City Of STP?

The address on the plant’s EPA facility record is State Highway 1 And English Ri, Kalona, IA 52247, in Washington County. Its coordinates are 41.4727, -91.7118. For some plants the record holds the utility’s mailing address rather than the plant gate.

How much wastewater does Kalona City Of STP treat?

Kalona City Of STP treats an average of 0.31 MGD and is permitted for a design flow of 1.77 MGD.

What treatment technology does Kalona City Of STP use?

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

What is the NPDES permit for Kalona City Of STP?

The facility discharges under NPDES permit IA0059196, currently effective, expiring April 2027.

Is Kalona City Of STP in compliance?

Discharge monitoring reports show 57 violations at Kalona City Of STP in the last three years, 9 of them effluent limit exceedances. The full history is available in Klarifi.

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

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

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Kalona City Of STP

State Highway 1 And English Ri, Kalona, IA 52247 · Washington County · Publicly Owned Treatment Works

Average flow: 0.31 MGD

Design flow: 1.77 MGD

NPDES permit: IA0059196; Effective

Permit expires: April 2027

Population served: 2,630; CWNS 2022

Kalona City Of STP is a publicly owned wastewater treatment works in Kalona, Washington County, Iowa treating an average of 0.31 million gallons per day against a permitted design capacity of 1.77 MGD, serving about 2,630 residents. It discharges under NPDES permit IA0059196 (effective), which expires in April 2027, with 57 recorded violations in the last three years.

Treatment technology

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

Available with a free Klarifi account

See the full treatment train at Kalona City Of STP: structures, unit processes and planned upgrades, with exact unit counts.

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Compliance snapshot (last 3 years)

Total violations: 57

Effluent violations: 9

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

Key contacts

1 verified contact for Kalona 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 Kalona City Of STP, plus the full compliance history and discharge data.

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Nearby wastewater treatment plants in Iowa

Wellman City Of STP

Wellman · 7 mi away

0.22 MGD

Riverside City Of STP

Riverside · 7 mi away

0.17 MGD

Hills, City Of WWTF

Hills · 11 mi away

0.16 MGD

West Chester City Of STP

West Chester · 11 mi away

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Washington City Of STP

Washington · 13 mi away

1.65 MGD

Lone Tree South WWTP

Lone Tree · 14 mi away

0.3 MGD

Iowa City, City Of (south) STP

Iowa City · 14 mi away

8.98 MGD

Ainsworth City Of STP

Ainsworth · 15 mi away

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Kalona 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 March 28, 2025.

Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Biological nutrient removal · Tertiary treatment · all terms

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