Saint Olaf City Of STP
Saint Olaf, IA 52072 · Clayton County · Publicly Owned Treatment Works
- Average flow
- 0.0055 MGD
- Design flow
- 0.02 MGD
- NPDES permit
- IA0071072
- Effective
- Permit expires
- December 2026
- Population served
- —
- CWNS 2022
Saint Olaf City Of STP is a publicly owned wastewater treatment works in Saint Olaf, Clayton County, Iowa treating an average of 0.0055 million gallons per day against a permitted design capacity of 0.02 MGD. It discharges under NPDES permit IA0071072 (effective), which expires in December 2026, with 8 recorded violations in the last three years.
Treatment technology
Treatment structures and unit processes at Saint Olaf City Of STP.
Treatment structure data not yet analyzed for this facility.
Compliance snapshot (last 3 years)
- Total violations
- 8
- Effluent violations
- 8
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
1 verified contact for Saint Olaf 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 Saint Olaf City Of STP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Iowa
Elkader · 6 mi away
0.1 MGD
Monona · 8 mi away
0.16 MGD
Garnavillo · 9 mi away
0.06 MGD
Luana · 10 mi away
—
Elgin · 12 mi away
0.04 MGD
Mcgregor · 13 mi away
0.04 MGD
Marquette · 13 mi away
0.03 MGD
Postville · 14 mi away
0.31 MGD
Saint Olaf 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 · Sludge dewatering · Biological nutrient removal · all terms