What is the address of Delhi City Of STP?

The address on the plant’s EPA facility record is 2553 240th Ave., Delhi, IA 52223, in Delaware County. Its coordinates are 42.4182, -91.3290. For some plants the record holds the utility’s mailing address rather than the plant gate.

How much wastewater does Delhi City Of STP treat?

Delhi City Of STP is permitted for a design flow of 0.18 MGD. Its average daily flow is not available in the current EPA data.

What treatment technology does Delhi City Of STP use?

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

What is the NPDES permit for Delhi City Of STP?

The facility discharges under NPDES permit IA0047848, currently effective, expiring March 2027.

Is Delhi City Of STP in compliance?

Discharge monitoring reports show 6 violations at Delhi City Of STP in the last three years, 6 of them effluent limit exceedances. The full history is available in Klarifi.

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

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

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Delhi City Of STP

2553 240th Ave., Delhi, IA 52223 · Delaware County · Publicly Owned Treatment Works

Average flow: —

Design flow: 0.18 MGD

NPDES permit: IA0047848; Effective

Permit expires: March 2027

Population served: 420; CWNS 2022

Delhi City Of STP is a publicly owned wastewater treatment works in Delhi, Delaware County, Iowa, serving about 420 residents. It discharges under NPDES permit IA0047848 (effective), which expires in March 2027, with 6 recorded violations in the last three years.

Treatment technology

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

Available with a free Klarifi account

See the full treatment train at Delhi 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: 6

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

Key contacts

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

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Nearby wastewater treatment plants in Iowa

Delaware City Of STP

Delaware · 4 mi away

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Earlville City Of STP

Earlville · 5 mi away

0.08 MGD

Hopkinton WWTP

Hopkinton · 7 mi away

0.05 MGD

Manchester WWTP

Manchester · 7 mi away

0.64 MGD

Ryan WWTP

Ryan · 9 mi away

—

Worthington WWTP

Worthington · 10 mi away

0.09 MGD

Petersburg, City Of STP (eiruss)

Dyersville · 11 mi away

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Greeley City Of STP

Greeley · 11 mi away

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Delhi 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 17, 2025.

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

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