Walker City Of STP
408 Rowling Street, Walker, IA 52352 · Linn County · Publicly Owned Treatment Works
- Average flow
- 0.11 MGD
- Design flow
- —
- NPDES permit
- IA0059081
- Effective
- Permit expires
- July 2027
- Population served
- 688
- CWNS 2022
Walker City Of STP is a publicly owned wastewater treatment works in Walker, Linn County, Iowa treating an average of 0.11 million gallons per day, serving about 688 residents. It discharges under NPDES permit IA0059081 (effective), which expires in July 2027, with 3 recorded violations in the last three years.
Treatment technology
2 treatment structures and unit processes identified at Walker City Of STP.
Available with a free Klarifi account
See the full treatment train at Walker City Of STP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 3
- Effluent violations
- 3
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
1 verified contact for Walker 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 Walker City Of STP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Iowa
Walker · 6 mi away
—
Center Point · 6 mi away
0.3 MGD
Rowley · 7 mi away
—
Urbana · 7 mi away
0.14 MGD
Quasqueton · 8 mi away
0.03 MGD
Brandon · 12 mi away
0.03 MGD
Alburnett · 13 mi away
—
Vinton · 13 mi away
1.11 MGD
Walker 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 February 1, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Filter press · FOG · all terms