Ottumwa City Of STP
2222 Emma Street, Ottumwa, IA 52501 · Wapello County · Publicly Owned Treatment Works
- Average flow
- 3.24 MGD
- Design flow
- 12.5 MGD
- NPDES permit
- IA0058611
- Effective
- Permit expires
- February 2031
- Population served
- 25,595
- CWNS 2022
Ottumwa City Of STP is a publicly owned wastewater treatment works in Ottumwa, Wapello County, Iowa treating an average of 3.24 million gallons per day against a permitted design capacity of 12.5 MGD, serving about 25,595 residents. It discharges under NPDES permit IA0058611 (effective), which expires in February 2031, with 1 recorded violation in the last three years.
Treatment technology
2 treatment structures and unit processes identified at Ottumwa City Of STP.
Available with a free Klarifi account
See the full treatment train at Ottumwa City Of STP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 1
- Effluent violations
- 1
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Industrial users and pretreatment
Industries that discharge process wastewater to Ottumwa City Of STP, from the plant's pretreatment programme records.
- Industrial users
- 3
- on record
On record: C& C Manufacturing (Ottumwa); John Deere Ottumwa Works (Ottumwa); Ottumwa Generating Sta-Alliant Energy (Ottumwa). Most users are in automotive, metal and equipment manufacturing and water, sewer and power utilities.
Industrial users of Ottumwa City Of STP →
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Discharge flow, federal category, source documents and contacts for every industrial user of Ottumwa City Of STP. Free with a Klarifi account.
Key contacts
1 verified contact for Ottumwa 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 Ottumwa City Of STP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Iowa
Agency · 5 mi away
0.04 MGD
Chillicothe · 9 mi away
—
Ottumwa · 11 mi away
—
Eldon · 12 mi away
0.09 MGD
Batavia · 12 mi away
—
Hedrick · 13 mi away
0.11 MGD
Martinsburg · 13 mi away
—
Blakesburg · 14 mi away
—
Ottumwa 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 16, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Oxidation ditch · Anaerobic digester · all terms