Mason WWTP
Mason City, IA · Cerro Gordo County · Publicly Owned Treatment Works
- Average flow
- 8.27 MGD
- Design flow
- —
- NPDES permit
- 3603997446
- Effective
- Permit expires
- May 2029
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Clarifiers
Unlock
Uncovered lagoons
Unlock
Biogas silos
Unlock
Biogas balloons
Unlock
Unlock exact unit counts →
Compliance snapshot (last 3 years)
- Total violations
- 6
- Effluent violations
- 6
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
5 verified contacts for Mason WWTP, with validated emails and direct phone numbers.
Unlock 5 verified contacts
Names, validated emails and direct phone numbers for decision-makers at Mason WWTP — plus full compliance history and discharge data.
Try Klarifi free+ 1 more verified contact in Klarifi
Data sourced from public EPA / NPDES records and Klarifi analysis. Last updated March 2025.