Facility profile
Marathon Martinez Refinery
Significant Violation across 12 of the last 12 quarters, with $29,426,674 in recorded penalties.
Noncompliance quarters
12
Counted from the imported ECHO record over the last 12 quarters.
Penalties
$29,426,674
Recorded enforcement amount carried into the facility page.
Last inspection
2025-06-18
Displayed as plain language instead of hidden in agency exports.
Trend
Watch
Reported on-site releases are higher in 2024 than in 2022.
| Year | Air | Water | Land | Total |
|---|---|---|---|---|
| 2022 | 20,561 lbs | 2 lbs | 0 lbs | 20,563 lbs |
| 2023 | 58,134 lbs | 5,793 lbs | 0 lbs | 63,927 lbs |
| 2024 | 65,575 lbs | 7,403 lbs | 0 lbs | 72,979 lbs |
Chemical breakdown
What this facility is reporting
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n-Hexane
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Ammonia
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Toluene
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Nitrate compounds (water dissociable; reportable only when in aqueous solution)
Latest 2024 TRI data shows water as the largest reported pathway for this chemical at the facility.
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Xylene (mixed isomers)
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Benzene
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Cyclohexane
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Hydrogen sulfide
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Ethylbenzene
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Zinc compounds
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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1, 2, 4-Trimethylbenzene
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Cumene
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Nickel compounds
Latest 2024 TRI data shows water as the largest reported pathway for this chemical at the facility.
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Naphthalene
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Molybdenum trioxide
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Lead compounds
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Ethylene
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Polycyclic aromatic compounds
Latest 2024 TRI data shows water as the largest reported pathway for this chemical at the facility.
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Mercury compounds
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Benzo[g, h, i]perylene
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Biphenyl
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
Enforcement layer
Why the ECHO-style detail matters
Significant Violation across 12 of the last 12 quarters, with $29,426,674 in recorded penalties.