Wellman City Of STP
316 8th Avenue, Wellman, IA 52356 · Washington County · Publicly Owned Treatment Works
- Average flow
- 0.22 MGD
- Design flow
- 0.91 MGD
- NPDES permit
- IA0032301
- Effective
- Permit expires
- July 2031
- Population served
- 1,482
- CWNS 2022
Wellman City Of STP is a publicly owned wastewater treatment works in Wellman, Washington County, Iowa treating an average of 0.22 million gallons per day against a permitted design capacity of 0.91 MGD, serving about 1,482 residents. It discharges under NPDES permit IA0032301 (effective), which expires in July 2031, with 17 recorded violations in the last three years.
Treatment technology
Treatment structures and unit processes at Wellman City Of STP.
Treatment structure data not yet analyzed for this facility.
Compliance snapshot (last 3 years)
- Total violations
- 17
- 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 Wellman City Of STP, with validated emails and direct phone numbers.
Unlock 1 verified contact
Names, validated emails and direct phone numbers for decision-makers at Wellman City Of STP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Iowa
Kalona · 7 mi away
0.31 MGD
West Chester · 9 mi away
—
Keota · 10 mi away
0.2 MGD
North English · 12 mi away
0.1 MGD
South English · 13 mi away
—
Harper · 13 mi away
—
Riverside · 13 mi away
0.17 MGD
Washington · 14 mi away
1.65 MGD
Wellman 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 February 28, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Sludge dewatering · Biological nutrient removal · all terms