Early City Of STP
Early, IA · Sac County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- 1.22 MGD
- NPDES permit
- IA0035904
- Effective
- Permit expires
- October 2030
- Population served
- 587
- CWNS 2022
Early City Of STP is a publicly owned wastewater treatment works in Early, Sac County, Iowa, serving about 587 residents. Treatment on site includes uncovered lagoons. It discharges under NPDES permit IA0035904 (effective), which expires in October 2030, with 2 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Uncovered lagoons
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Compliance snapshot (last 3 years)
- Total violations
- 2
- Effluent violations
- 2
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Early City Of STP.
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Nearby wastewater treatment plants in Iowa
Schaller · 8 mi away
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Sac City · 9 mi away
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Storm Lake · 10 mi away
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Odebolt · 11 mi away
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Lake View · 11 mi away
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Arthur · 13 mi away
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Wall Lake · 14 mi away
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Galva · 14 mi away
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Early 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 September 11, 2026; facility record last updated March 28, 2025.