Benicia WWTP
614 E 5th St, Benicia, CA 94510 · Solano County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- 18 MGD
- NPDES permit
- CA0038091
- Effective
- Permit expires
- March 2030
- Population served
- 25,357
- CWNS 2022
Benicia WWTP is a publicly owned wastewater treatment works in Benicia, Solano County, California, serving about 25,357 residents. It discharges under NPDES permit CA0038091 (effective), which expires in March 2030, with 2 recorded violations in the last three years.
Treatment technology
2 treatment structures and unit processes identified at Benicia WWTP.
Available with a free Klarifi account
See the full treatment train at Benicia 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.
EPA enforcement history
Federal civil enforcement cases, compliance inspections and informal actions recorded for Benicia WWTP in EPA's ICIS system.
- Formal actions
- 0
- none on record
- EPA inspections
- 1
- latest Feb 2026
No formal federal enforcement case is on record for this plant.
Full case history with a free Klarifi account
Every action against Benicia WWTP with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Key contacts
2 verified contacts for Benicia WWTP, with validated emails and direct phone numbers.
Unlock 2 verified contacts
Names, validated emails and direct phone numbers for decision-makers at Benicia WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in California
Martinez · 3 mi away
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Martinez · 6 mi away
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Rodeo · 6 mi away
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Vallejo · 6 mi away
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Pinole · 8 mi away
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American Canyon · 12 mi away
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Napa · 15 mi away
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Antioch · 17 mi away
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Benicia 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 May 10, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · FOG · Equalization tank · all terms