County page
Contra Costa County
Contra Costa County currently shows 2 Superfund sites, 264 imported facility profiles, and 1,559,208 lbs in loaded TRI releases.
Overview
What this county page is saying
This live county page is generated from the ingested EPA datasets. It merges ECHO facility compliance rows, TRI release totals, and any Superfund sites attached to Contra Costa County.
The latest loaded TRI year is 2024, with 1,559,208 lbs in county-level on-site releases tied to the imported facility set.
Focus points
Design and product notes
County pages combine facility compliance history with chemical release totals.
TRI chemistry shows what is being reported, while ECHO shows who keeps drawing enforcement attention.
Superfund records add legacy cleanup context even when live contaminant detail is still sparse.
Superfund layer
Cleanup sites in this county
Concord Naval Weapons Station
Concord Naval Weapons Station is in EPA's Superfund layer for Concord, CA. Live ingestion currently includes the official EPA detail links and geocoded site record.
United Heckathorn Co
United Heckathorn Co is in EPA's Superfund layer for Richmond, CA. Live ingestion currently includes the official EPA detail links and geocoded site record.
Facilities
Worst polluters and compliance pressure
Marathon Martinez Refinery
Significant Violation across 12 of the last 12 quarters, with $29,426,674 in recorded penalties.
Martinez Refining Company
Significant Violation across 12 of the last 12 quarters, with $2,408,470 in recorded penalties.
Chevron Refinery Richmond
Significant Violation across 12 of the last 12 quarters, with $2,393,800 in recorded penalties.
Chemtrade West Us Llc
Significant Violation across 12 of the last 12 quarters, with $1,158,000 in recorded penalties.
San Francisco Refinery At Rodeo, California
Significant Violation across 12 of the last 12 quarters, with $3,000 in recorded penalties.
Shell Catalysts &technologies
Significant Violation across 12 of the last 12 quarters, with $26,550 in recorded penalties.
Henkel Corp
Significant Violation across 12 of the last 12 quarters, with $7,500 in recorded penalties.
Richmond Products Terminal
Significant Violation across 12 of the last 12 quarters, with $217,180 in recorded penalties.
Republic Services - Keller Canyon
Significant Violation across 12 of the last 12 quarters, with $169,250 in recorded penalties.
C&h Sugar Co Inc
Significant Violation across 12 of the last 12 quarters, with $128,500 in recorded penalties.
Air Liquide Large Industries Us Lp
Significant Violation across 12 of the last 12 quarters, with $244,000 in recorded penalties.
West County Landfill
Significant Violation across 12 of the last 12 quarters, with $160,005 in recorded penalties.
Nustar Shore Terminal Crockett
Significant Violation across 12 of the last 12 quarters, with $89,000 in recorded penalties.
Martinez Refining Company Llc (previously Shell Oil Products Us, Martinez Ref.)
Significant Violation across 12 of the last 12 quarters, with $121,500 in recorded penalties.
Los Medanos Energy Center
Significant Violation across 12 of the last 12 quarters, with $49,090 in recorded penalties.
Cemex - Clayton Quarry
Significant Violation across 12 of the last 12 quarters, with $65,000 in recorded penalties.
Delta Energy Center
Significant Violation across 12 of the last 12 quarters, with $40,000 in recorded penalties.
Acme Landfill
Significant Violation across 12 of the last 12 quarters, with $17,500 in recorded penalties.
K2 Pure Solutions - Pittsburg Plant
Significant noncompliance across 7 of the last 12 quarters, with $85,189 in recorded penalties.
Corteva Agriscience - Pittsburg Operations
Significant Violation across 12 of the last 12 quarters in the imported ECHO record.
| Chemical | Group | Facilities | Total pounds |
|---|---|---|---|
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | TRI-listed chemical | 6 | 598,283 lbs |
| Ammonia | TRI-listed chemical | 11 | 460,595 lbs |
| Hydrogen cyanide | TRI-listed chemical | 2 | 96,000 lbs |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | TRI-listed chemical | 7 | 74,712 lbs |
| n-Hexane | TRI-listed chemical | 9 | 43,619 lbs |
| Propylene | TRI-listed chemical | 7 | 35,198 lbs |
| Toluene | Volatile organic compound | 8 | 30,121 lbs |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | TRI-listed chemical | 6 | 29,871 lbs |
| Methanol | TRI-listed chemical | 5 | 25,874 lbs |
| Xylene (mixed isomers) | Volatile organic compound | 9 | 24,519 lbs |
| Zinc compounds | TRI-listed chemical | 8 | 22,603 lbs |
| Carbonyl sulfide | TRI-listed chemical | 3 | 21,542 lbs |
| Hydrogen sulfide | TRI-listed chemical | 5 | 19,005 lbs |
| Benzene | Volatile organic compound | 7 | 8,363 lbs |
| 2, 4-Dimethylphenol | TRI-listed chemical | 1 | 7,301 lbs |
| Cyclohexane | TRI-listed chemical | 6 | 6,783 lbs |
| Ethylbenzene | Volatile organic compound | 8 | 6,725 lbs |
| Silver compounds | TRI-listed chemical | 1 | 6,698 lbs |
| Phenol | TRI-listed chemical | 3 | 6,044 lbs |
| Carbon disulfide | TRI-listed chemical | 3 | 5,830 lbs |
Violation pages
State-level violation context tied to this county
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Clean Air Act violations in California
California facilities in the imported ECHO data show air-program oversight, inspections, or noncompliance signals.
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Clean Water Act violations in California
California facilities in the imported ECHO data show water-permit pressure, inspections, or noncompliance signals.
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RCRA violations in California
California facilities in the imported ECHO data show hazardous-waste or RCRA oversight signals.