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Holy Cross City Of STP

Main St & Sunshine St, Holy Cross, IA 52053 · Dubuque County · Publicly Owned Treatment Works

Average flow
—
Design flow
0.14 MGD
NPDES permit
IA0025992
Effective
Permit expires
July 2030
Population served
356
CWNS 2022

Holy Cross City Of STP is a publicly owned wastewater treatment works in Holy Cross, Dubuque County, Iowa, serving about 356 residents. It discharges under NPDES permit IA0025992 (effective), which expires in July 2030, with 1 recorded violation in the last three years.

Treatment technology

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

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Compliance snapshot (last 3 years)

Total violations
1
Effluent violations
1

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

Key contacts

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

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Nearby wastewater treatment plants in Iowa

Luxemburg WWTP

Luxemburg · 4 mi away

—

Rickardsville WWTP

Durango · 7 mi away

—

New Vienna WWTP

New Vienna · 8 mi away

0.02 MGD

Farley City Of STP

Farley · 11 mi away

0.24 MGD

Sherrill East WWTP

Sherrill · 11 mi away

—

Petersburg, City Of STP (eiruss)

Dyersville · 11 mi away

—

Dyersville WWTP

Dyersville · 12 mi away

0.55 MGD

Epworth WWTP

Epworth · 12 mi away

0.13 MGD

Holy Cross 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 · Filter press · FOG · all terms


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