Swisher WWTP
Oak Ave SE, Swisher, IA 52338 · Johnson County · Publicly Owned Treatment Works
- Average flow
- 0.12 MGD
- Design flow
- 0.17 MGD
- NPDES permit
- IA0033774
- Effective
- Permit expires
- June 2031
- Population served
- 941
- CWNS 2022
Swisher WWTP is a publicly owned wastewater treatment works in Swisher, Johnson County, Iowa treating an average of 0.12 million gallons per day against a permitted design capacity of 0.17 MGD, serving about 941 residents. It discharges under NPDES permit IA0033774 (effective), which expires in June 2031, with 2 recorded violations in the last three years.
Treatment technology
2 treatment structures and unit processes identified at Swisher WWTP.
Available with a free Klarifi account
See the full treatment train at Swisher WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 2
- Effluent violations
- 2
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
1 verified contact for Swisher WWTP, with validated emails and direct phone numbers.
Unlock 1 verified contact
Names, validated emails and direct phone numbers for decision-makers at Swisher WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Iowa
Ely · 6 mi away
0.17 MGD
Fairfax · 7 mi away
0.28 MGD
Walford · 8 mi away
0.17 MGD
Amana · 9 mi away
0.12 MGD
North Liberty · 9 mi away
2.03 MGD
Tiffin · 9 mi away
0.52 MGD
Oxford · 9 mi away
0.12 MGD
Solon · 10 mi away
0.49 MGD
Swisher WWTP: 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 April 23, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · WWTP · Biosolids · all terms