Saint Ansgar WWTP
1450 420th Street, St. Ansgar, IA 50472 · Mitchell County · Publicly Owned Treatment Works
- Average flow
- 0.1 MGD
- Design flow
- 0.24 MGD
- NPDES permit
- IA0033723
- Effective
- Permit expires
- March 2030
- Population served
- 1,111
- CWNS 2022
Saint Ansgar WWTP is a publicly owned wastewater treatment works in St. Ansgar, Mitchell County, Iowa treating an average of 0.1 million gallons per day against a permitted design capacity of 0.24 MGD, serving about 1,111 residents. It discharges under NPDES permit IA0033723 (effective), which expires in March 2030, with 37 recorded violations in the last three years. EPA has recorded 1 formal enforcement action naming the plant, the latest in October 2024.
Treatment technology
One treatment structure or unit process identified at Saint Ansgar WWTP.
Available with a free Klarifi account
See the full treatment train at Saint Ansgar WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 37
- Effluent violations
- 24
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
EPA enforcement history
Federal civil enforcement cases, compliance inspections and informal actions recorded for Saint Ansgar WWTP in EPA's ICIS system.
- Formal actions
- 1
- 1 since FY2020
- EPA inspections
- 0
- none on record
Latest case · Oct 2024
ST. ANSGAR WWTF
Administrative order · CWA, NPDES Permit Violations · Default Order, No Penalty
EPA's description of the case:
“Respondent failed to comply with effluent limitations and permit conditions required by Respondent's NPDES Permit pursuant to Section 402 of the Clean Water Act.”
Source: EPA ECHO, civil enforcement case 07-2021-0077.
Full case history with a free Klarifi account
Every action against Saint Ansgar WWTP with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Key contacts
1 verified contact for Saint Ansgar WWTP, with validated emails and direct phone numbers.
Unlock 1 verified contact
Names, validated emails and direct phone numbers for decision-makers at Saint Ansgar WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Iowa
Grafton · 8 mi away
—
Osage · 8 mi away
0.41 MGD
Osage · 8 mi away
0.03 MGD
Stacyville · 9 mi away
—
Orchard · 13 mi away
—
Rock Falls · 13 mi away
—
Kensett · 14 mi away
—
Plymouth · 14 mi away
0.12 MGD
Saint Ansgar 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 March 28, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Filter press · FOG · all terms