Pollution in Contra Costa County, California

Contra Costa County contains 264 EPA-regulated facilities, 28 of which are currently flagged for significant noncompliance. The county also hosts 2 Superfund sites and 37 TRI chemical reporters. EPA has assessed $54.0M in lifetime penalties and TRI reporters disclosed roughly 1.6M lb of on-site releases. That facility count is well above the California state average of 108 per county.

Superfund2NPL sites
TRI Facilities37reporters
EPA Facilities264regulated
Sig. Violators28current SNC

Superfund sites

SiteCityStatus
United Heckathorn CoRichmondCleanup underway
Concord Naval Weapons StationConcordCleanup underway

Largest releasers

FacilityCityOn-site (lb)Status
Martinez Refining CompanyMartinez699.2kSig. violation
Chevron Refinery RichmondRichmond474.2kSig. violation
San Francisco Refinery At Rodeo, CaliforniaRodeo199.7kSig. violation
Marathon Martinez RefineryMartinez73.0kSig. violation
Air Products & Chemicals - MartinezMartinez26.8kCompliant
Air Liquide, RodeoRodeo24.1kCompliant
Ir Products West Coast Hydrogen - Hp-2Martinez17.4kCompliant
Shell Chemical Lp - Martinez Catayst PlantMartinez13.6kCompliant
Corteva Agriscience - Pittsburg OperationsPittsburg7.6kSig. violation
Solvay Usa IncMartinez6.0kSig. violation
Silgan Containers Mfg CorpAntioch5.1kCompliant
Air Products West Coast Hydrogen - Hp-1Martinez2.6kCompliant
Phillips Richmond TerminalRichmond2.4kCompliant
Shell Catalysts &technologiesBay Point1.3kSig. violation
Chevron Richmond Technology CenterRichmond942Compliant
Chemtrade West Us LlcRichmond805Sig. violation
Monsanto CompanyMartinez700Compliant
Bio-Rad LaboratoriesRichmond689Compliant
Brenntag PacificRichmond500Compliant
Military Ocean Terminal ConcordConcord234Compliant
K2 Pure Solutions - Pittsburg PlantPittsburg96Penalties
Henkel CorpBay Point48Sig. violation
A & B Die Casting IncHercules26Compliant
Hasa IncPittsburg5Compliant
Georgia-Pacific Gypsum LlcAntioch4Compliant
Gold Bond Building Products LlcRichmond3Compliant

Significant violators

FacilityCityPenaltiesLast Inspected
Marathon Martinez RefineryMartinez$29.4M2025-06-18
Martinez Refining CompanyMartinez$2.4M2025-12-09
Chevron Refinery RichmondRichmond$2.4M2025-08-07
Chemtrade West Us LlcRichmond$1.2M2025-03-25
Air Liquide Large Industries Us LpRodeo$244.0k2024-12-17
Richmond Products TerminalRichmond$217.2k2024-05-07
Republic Services - Keller CanyonPittsburg$169.2k2023-08-21
West County LandfillRichmond$160.0k2026-02-05
C&h Sugar Co IncCrockett$128.5k2025-07-02
Martinez Refining Company Llc (Previously Shell Oil Products Us, Martinez Ref.)Martinez$121.5k2025-06-10
Nustar Shore Terminal CrockettCrockett$89.0k2025-04-29
Cemex - Clayton QuarryClayton$65.0k2023-05-23
Los Medanos Energy CenterPittsburg$49.1k2025-01-28
Delta Energy CenterPittsburg$40.0k2025-01-22
Shell Catalysts &technologiesBay Point$26.6k2026-02-24
Crockett Cogen ProjectCrockett$21.0k2025-04-08
Acme LandfillMartinez$17.5k2024-08-07
Uss-Upi, LlcPittsburg$17.5k2026-01-21
Henkel CorpBay Point$7.5k2025-12-18
San Francisco Refinery At Rodeo, CaliforniaRodeo$3.0k2026-01-21
Pacific Gas & Electric CoConcord$7502024-08-05
City Of Richmond - Barrett Ave Lift StationRichmond$0
Solvay Usa IncMartinez$02025-12-04
Conocophillips Carbon PlantRodeo$02026-02-20
Corteva Agriscience - Pittsburg OperationsPittsburg$02025-11-13
E B M U D Orinda Water Trtmnt PlantOrinda$02024-09-25
Air Products & Chemicals, Inc - MartinezMartinez$02023-12-14
Central Contra Costa Sanitary DistrictMartinez$02025-04-29