Central Contra Costa WWTF
5019 Imhoff Pl, Martinez, CA 94553 · Contra Costa County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- 53.8 MGD
- NPDES permit
- CA0037648
- Effective
- Permit expires
- July 2027
- Population served
- 552,952
- CWNS 2022
Central Contra Costa WWTF is a publicly owned wastewater treatment works in Martinez, Contra Costa County, California, serving about 552,952 residents. It discharges under NPDES permit CA0037648 (effective), which expires in July 2027, with 0 recorded violations in the last three years.
Treatment technology
2 treatment structures and unit processes identified at Central Contra Costa WWTF.
Available with a free Klarifi account
See the full treatment train at Central Contra Costa WWTF: structures, unit processes and planned upgrades, with exact unit counts.
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.
EPA enforcement history
Federal civil enforcement cases, compliance inspections and informal actions recorded for Central Contra Costa WWTF in EPA's ICIS system.
- Formal actions
- 0
- none on record
- EPA inspections
- 3
- latest May 2020
No formal federal enforcement case is on record for this plant.
Full case history with a free Klarifi account
Every action against Central Contra Costa WWTF with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Key contacts
1 verified contact for Central Contra Costa WWTF, with validated emails and direct phone numbers.
Unlock 1 verified contact
Names, validated emails and direct phone numbers for decision-makers at Central Contra Costa WWTF, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in California
Martinez · 2 mi away
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Benicia · 6 mi away
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Rodeo · 11 mi away
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Vallejo · 12 mi away
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Antioch · 12 mi away
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Pinole · 12 mi away
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Oakland · 17 mi away
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American Canyon · 17 mi away
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Central Contra Costa WWTF: 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 February 26, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Oxidation ditch · Anaerobic digester · all terms