City Of Sioux City STP
Sioux City, IA · Woodbury County · Publicly Owned Treatment Works
- Average flow
- 14.63 MGD
- Design flow
- 28.73 MGD
- NPDES permit
- 3604708481
- Effective
- Permit expires
- January 2031
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Compliance snapshot (last 3 years)
- Total violations
- 10
- Effluent violations
- 10
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Capital improvement projects in Sioux City
| Project | Budget | Years |
|---|---|---|
| WWTP Facility Plan Improvements | $170,000,000 | 2027–2028 |
| Annual Water System Improvements | $12,051,000 | 2026–2030 |
| Outer Drive Pressure and Storage | $11,738,200 | 2028–2028 |
| Annual Sanitary Sewer Improvements | $11,460,000 | 2026–2030 |
| Annual Undersized Water Main Replacements | $9,390,000 | 2026–2030 |
Full project details — scope, funding source, engineering consultant and the decision-makers behind each project — are available in Klarifi, along with similar wastewater capital projects in other cities.
Key contacts
2 verified contacts for City Of Sioux City STP, with validated emails and direct phone numbers.
Unlock 2 verified contacts
Names, validated emails and direct phone numbers for decision-makers at City Of Sioux City STP — plus full compliance history and discharge data.
Try Klarifi freeData sourced from public EPA / NPDES records and Klarifi analysis. Last updated May 2025.