Sioux Rapids City Of STP
206 2nd Street PO Box 473, Sioux Rapids, IA 50585 · Buena Vista County · Publicly Owned Treatment Works
- Average flow
- 0.04 MGD
- Design flow
- 0.2 MGD
- NPDES permit
- IA0042951
- Effective
- Permit expires
- March 2030
- Population served
- 748
- CWNS 2022
Sioux Rapids City Of STP is a publicly owned wastewater treatment works in Sioux Rapids, Buena Vista County, Iowa treating an average of 0.04 million gallons per day against a permitted design capacity of 0.2 MGD, serving about 748 residents. It discharges under NPDES permit IA0042951 (effective), which expires in March 2030, with 102 recorded violations in the last three years.
Treatment technology
One treatment structure or unit process identified at Sioux Rapids City Of STP.
Available with a free Klarifi account
See the full treatment train at Sioux Rapids City Of STP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 102
- Effluent violations
- 33
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 Sioux Rapids City Of STP, from the plant's pretreatment programme records.
- Industrial users
- 1
- on record
On record: Ranco Fertiservice INC (Sioux Rapids). 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 Sioux Rapids City Of STP. Free with a Klarifi account.
Key contacts
1 verified contact for Sioux Rapids 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 Sioux Rapids City Of STP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Iowa
Linn Grove · 4 mi away
—
Rembrandt · 5 mi away
—
Greenville · 8 mi away
0.0031 MGD
Webb · 8 mi away
—
Peterson · 9 mi away
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Marathon · 10 mi away
0.01 MGD
Albert City · 13 mi away
0.06 MGD
Royal · 14 mi away
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Sioux Rapids 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 November 26, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Filter press · FOG · all terms