Corning City Of STP
.25 Miles SE Of Loomis Av & 4th St Intersection, Corning, IA 50841 · Adams County · Publicly Owned Treatment Works
- Average flow
- 0.47 MGD
- Design flow
- 1.1 MGD
- NPDES permit
- IA0027375
- Effective
- Permit expires
- July 2027
- Population served
- 1,564
- CWNS 2022
Corning City Of STP is a publicly owned wastewater treatment works in Corning, Adams County, Iowa treating an average of 0.47 million gallons per day against a permitted design capacity of 1.1 MGD, serving about 1,564 residents. It discharges under NPDES permit IA0027375 (effective), which expires in July 2027, with 13 recorded violations in the last three years.
Treatment technology
One treatment structure or unit process identified at Corning City Of STP.
Available with a free Klarifi account
See the full treatment train at Corning City Of STP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 13
- Effluent violations
- 13
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 Corning City Of STP, from the plant's pretreatment programme records.
- Industrial users
- 1
- on record
On record: POET Biorefining - Corning (Corning). Most users are in chemicals, plastics and petroleum.
Unlock the details behind these industrial users
Discharge flow, federal category, source documents and contacts for every industrial user of Corning City Of STP. Free with a Klarifi account.
Key contacts
2 verified contacts for Corning City Of STP, with validated emails and direct phone numbers.
Unlock 2 verified contacts
Names, validated emails and direct phone numbers for decision-makers at Corning City Of STP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Iowa
Prescott · 7 mi away
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Nodaway · 9 mi away
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Lenox · 12 mi away
0.2 MGD
Villisca · 13 mi away
0.18 MGD
Sharpsburg · 13 mi away
—
Creston · 15 mi away
—
Gravity · 16 mi away
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Bridgewater · 19 mi away
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Corning 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