Hawaii County Hilo WWTP
Hilo, HI · Hawaii County · Publicly Owned Treatment Works
- Average flow
- 3.51 MGD
- Design flow
- 5 MGD
- NPDES permit
- 3604299330
- Effective
- Permit expires
- April 2030
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Compliance snapshot (last 3 years)
- Total violations
- 46
- Effluent violations
- 2
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Contacts for Hawaii County Hilo WWTP are available in the Klarifi platform.
Unlock contacts for this facility
Names, validated emails and direct phone numbers for decision-makers at Hawaii County Hilo WWTP — plus full compliance history and discharge data.
Try Klarifi freeData sourced from public EPA / NPDES records and Klarifi analysis. Last updated September 2025.