What is the address of Dyersville WWTP?

The address on the plant’s EPA facility record is 23rd Ave SW, Dyersville, IA 52040, in Dubuque County. Its coordinates are 42.4659, -91.1196. For some plants the record holds the utility’s mailing address rather than the plant gate.

How much wastewater does Dyersville WWTP treat?

Dyersville WWTP treats an average of 0.55 MGD and is permitted for a design flow of 3.46 MGD.

What treatment technology does Dyersville WWTP use?

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

What is the NPDES permit for Dyersville WWTP?

The facility discharges under NPDES permit IA0023345, currently effective, expiring January 2031.

Is Dyersville WWTP in compliance?

Discharge monitoring reports show 12 violations at Dyersville WWTP in the last three years, 12 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Dyersville WWTP and how do I contact them?

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

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Dyersville WWTP

23rd Ave SW, Dyersville, IA 52040 · Dubuque County · Publicly Owned Treatment Works

Average flow: 0.55 MGD

Design flow: 3.46 MGD

NPDES permit: IA0023345; Effective

Permit expires: January 2031

Population served: 4,241; CWNS 2022

Dyersville WWTP is a publicly owned wastewater treatment works in Dyersville, Dubuque County, Iowa treating an average of 0.55 million gallons per day against a permitted design capacity of 3.46 MGD, serving about 4,241 residents. It discharges under NPDES permit IA0023345 (effective), which expires in January 2031, with 12 recorded violations in the last three years.

Treatment technology

One treatment structure or unit process identified at Dyersville WWTP.

Available with a free Klarifi account

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

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Compliance snapshot (last 3 years)

Total violations: 12

Effluent violations: 12

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

Key contacts

1 verified contact for Dyersville WWTP, with validated emails and direct phone numbers.

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Names, validated emails and direct phone numbers for decision-makers at Dyersville WWTP, plus the full compliance history and discharge data.

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Nearby wastewater treatment plants in Iowa

Worthington WWTP

Worthington · 5 mi away

0.09 MGD

New Vienna WWTP

New Vienna · 5 mi away

0.02 MGD

Farley City Of STP

Farley · 6 mi away

0.24 MGD

Petersburg, City Of STP (eiruss)

Dyersville · 7 mi away

—

Earlville City Of STP

Earlville · 8 mi away

0.08 MGD

Luxemburg WWTP

Luxemburg · 9 mi away

—

Epworth WWTP

Epworth · 11 mi away

0.13 MGD

Hopkinton WWTP

Hopkinton · 11 mi away

0.05 MGD

Dyersville 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 February 27, 2025.

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

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