Clarion, City Of STP
Clarion, IA 50525 · Wright County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- 1.5 MGD
- NPDES permit
- IA0030945
- Effective
- Permit expires
- January 2028
- Population served
- 2,979
- CWNS 2022
Clarion, City Of STP is a publicly owned wastewater treatment works in Clarion, Wright County, Iowa, serving about 2,979 residents. It discharges under NPDES permit IA0030945 (effective), which expires in January 2028, with 13 recorded violations in the last three years.
Treatment technology
One treatment structure or unit process identified at Clarion, City Of STP.
Available with a free Klarifi account
See the full treatment train at Clarion, 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 Clarion, City Of STP, from the plant's pretreatment programme records.
- Industrial users
- 1
- on record
On record: Hagie Manufacturing Company (Clarion). Most users are in automotive, metal and equipment manufacturing.
Unlock the details behind these industrial users
Discharge flow, federal category, source documents and contacts for every industrial user of Clarion, City Of STP. Free with a Klarifi account.
Key contacts
1 verified contact for Clarion, 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 Clarion, City Of STP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Iowa
Clarion · 5 mi away
—
Eagle Grove · 10 mi away
1.93 MGD
Goldfield · 10 mi away
0.09 MGD
Belmond · 10 mi away
0.34 MGD
Renwick · 13 mi away
0.04 MGD
Dows · 13 mi away
0.11 MGD
Kanawha · 15 mi away
0.06 MGD
Thor · 16 mi away
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Clarion, 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 May 7, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Oxidation ditch · Anaerobic digester · all terms