What is the address of Derby City Of STP?

The address on the plant’s EPA facility record is Approximately 0.4 Miles West And 0.2 Miles South, Derby, IA 50068, in Lucas County. Its coordinates are 40.9392, -93.4601. For some plants the record holds the utility’s mailing address rather than the plant gate.

What treatment technology does Derby City Of STP use?

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

What is the NPDES permit for Derby City Of STP?

The facility discharges under NPDES permit IA0080322, currently effective, expiring September 2029.

Is Derby City Of STP in compliance?

Discharge monitoring reports show 6 violations at Derby City Of STP in the last three years. The full history is available in Klarifi.

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

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

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Derby City Of STP

Approximately 0.4 Miles West And 0.2 Miles South, Derby, IA 50068 · Lucas County · Publicly Owned Treatment Works

Average flow: —

Design flow: —

NPDES permit: IA0080322; Effective

Permit expires: September 2029

Population served: —; CWNS 2022

Derby City Of STP is a publicly owned wastewater treatment works in Derby, Lucas County, Iowa. It discharges under NPDES permit IA0080322 (effective), which expires in September 2029, with 6 recorded violations in the last three years.

Treatment technology

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

Available with a free Klarifi account

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

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Compliance snapshot (last 3 years)

Total violations: 6

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 Derby 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 Derby City Of STP, plus the full compliance history and discharge data.

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Nearby wastewater treatment plants in Iowa

Humeston City Of STP

Humeston · 5 mi away

0.13 MGD

Lucas City Of STP (rathbun Regional Water Association)

Lucas · 6 mi away

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Woodburn City Of (sirwa)

Woodburn · 8 mi away

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Garden Grove City Of STP

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Chariton City Of STP

Chariton · 11 mi away

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Weldon City Of STP

Weldon · 15 mi away

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Corydon City Of STP

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Osceola WWTP South

Osceola · 16 mi away

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Derby 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 April 23, 2025.

Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Significant industrial user · WWTP · all terms

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