Lewis WWTP
Lewis, IA · Cass County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- 0.42 MGD
- NPDES permit
- IA0057487
- Effective
- Permit expires
- September 2028
- Population served
- 357
- CWNS 2022
Lewis WWTP is a publicly owned wastewater treatment works in Lewis, Cass County, Iowa, serving about 357 residents. Treatment on site includes aerated lagoons. It discharges under NPDES permit IA0057487 (effective), which expires in September 2028, with 0 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Aerated lagoons
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Compliance snapshot (last 3 years)
- Total violations
- 0
- Effluent violations
- 0
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
1 verified contact for Lewis WWTP, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Lewis WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Iowa
Ionia · 208 mi away
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Clinton · 245 mi away
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Princeton · 246 mi away
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Sabula · 250 mi away
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Andover · 251 mi away
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Mccausland · 252 mi away
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Davenport · 254 mi away
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Eldridge · 255 mi away
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Lewis 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 September 11, 2026; facility record last updated August 13, 2026.