Refinery in Martinez Faces Potential Penalty of $5 Million due to Breaches in Air Quality Regulations
The Marathon Martinez Refinery in Martinez, California, has been under scrutiny for air quality violations over the past few years. The Bay Area Air Quality Management District (BAAQMD) has taken action against these violations, imposing fines, conducting investigations, and enforcing compliance with air quality rules.
Refinery Violations
In 2023, the refinery was among facilities in the Bay Area that failed to meet the requirements of BAAQMD Rule 12-15. This rule mandates monitoring and reporting of fugitive gas emissions from equipment like valves, compressors, and storage tanks. These emissions include hazardous chemicals such as benzene, known to be cancer-causing. Reports suggest that the refinery management knew about leaks for years but did not take adequate measures to report or mitigate them.
There have been other incidents, such as fires and flaring, which contribute to air pollution. For instance, a significant fire on May 5, 2025, triggered shelter-in-place orders due to potential health risks from smoke and toxic emissions. The BAAQMD responded to complaints related to this fire and took part in monitoring air quality in the impacted areas.
Intermittent flaring incidents, controlled burning of excess gases to relieve pressure and prevent explosions, have also occurred. BAAQMD investigates these incidents for any air quality violations.
BAAQMD's Response and Actions
In 2024, BAAQMD imposed a historic $84 million fine on Valero and other refineries for violations of air quality regulations, the largest penalty ever assessed by the district. This fine was related to undisclosed leaks identified during inspections.
The BAAQMD has been actively monitoring complaints, investigating incidents such as fires and flaring, and enforcing compliance with air quality rules. Following significant incidents, BAAQMD collaborates with other agencies, such as the Alameda County District Attorney, to enforce civil penalties and ensure installation of pollution control equipment.
The Air District has been encouraging residents to prepare for unhealthy air quality episodes and issues advisories during incidents impacting air quality. Additionally, the BAAQMD supports local governments and communities in establishing safety ordinances to protect public health from refinery hazards.
Conclusion
The Marathon Martinez Refinery has been cited for violations including unreported fugitive emissions and incidents causing toxic releases. The Bay Area Air Quality Management District has addressed these through significant fines, ongoing investigations, operational monitoring, public health advisories, and collaboration with local authorities to mitigate risks to surrounding communities.
Residents interested in staying informed about air quality and other local developments are encouraged to subscribe to the 925 News newsletter, a comprehensive and free resource brought to readers by the website. The penalty imposed on the Marathon Martinez Refinery will largely be reinvested in local projects aimed at reducing pollution and enhancing public health.
- The refinery, along with other facilities in the Bay Area, neglected to comply with BAAQMD Rule 12-15 in 2023, which stipulates monitoring and reporting of fugitive gas emissions.
- The BAAQMD imposes financial penalties for violating air quality rules, as it did in 2024 with an $84 million fine on Valero and other refineries, marking the largest penalty ever assessed by the district.
- The BAAQMD supports local governments and communities in establishing safety ordinances to protect public health from refinery hazards and issues advisories during incidents impacting air quality.
- The penalty imposed on the Marathon Martinez Refinery will be reinvested in local projects aimed at reducing pollution and improving public health, as detailed in the 925 News newsletter.
