What is the address of Princeton City Of STP?

The address on the plant’s EPA facility record is Hwy 67 & 285th Ave, Princeton, IA 52768, in Scott County. Its coordinates are 41.6887, -90.3413. For some plants the record holds the utility’s mailing address rather than the plant gate.

How much wastewater does Princeton City Of STP treat?

Princeton City Of STP treats an average of 0.07 MGD and is permitted for a design flow of 0.73 MGD.

What treatment technology does Princeton City Of STP use?

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

What is the NPDES permit for Princeton City Of STP?

The facility discharges under NPDES permit IA0033227, currently effective, expiring March 2027.

Is Princeton City Of STP in compliance?

Discharge monitoring reports show 24 violations at Princeton City Of STP in the last three years, 24 of them effluent limit exceedances. The full history is available in Klarifi.

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

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

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Princeton City Of STP

Hwy 67 & 285th Ave, Princeton, IA 52768 · Scott County · Publicly Owned Treatment Works

Average flow: 0.07 MGD

Design flow: 0.73 MGD

NPDES permit: IA0033227; Effective

Permit expires: March 2027

Population served: 923; CWNS 2022

Princeton City Of STP is a publicly owned wastewater treatment works in Princeton, Scott County, Iowa treating an average of 0.07 million gallons per day against a permitted design capacity of 0.73 MGD, serving about 923 residents. It discharges under NPDES permit IA0033227 (effective), which expires in March 2027, with 24 recorded violations in the last three years.

Treatment technology

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

Available with a free Klarifi account

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

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Compliance snapshot (last 3 years)

Total violations: 24

Effluent violations: 24

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

Key contacts

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

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Nearby wastewater treatment plants in Iowa

Mccausland City Of STP

Mccausland · 7 mi away

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Leclaire City Of STP

Le Claire · 7 mi away

0.37 MGD

Clinton WWTP

Clinton · 10 mi away

6.52 MGD

Park View Water Co

Eldridge · 11 mi away

0.21 MGD

Eldridge City Of STP (south Slope)

Eldridge · 13 mi away

0.96 MGD

Long Grove City Of STP

Long Grove · 13 mi away

0.08 MGD

Dewitt WWTP

Dewitt · 13 mi away

0.82 MGD

Donahue City Of STP

Donahue · 18 mi away

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Princeton 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 19, 2026.

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

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