CA SB674

Expands air monitoring requirements to "covered facilities," including refineries producing gasoline, diesel, aviation fuel, biofuel, lubricating oil, asphalt, petrochemical feedstock, and related operations on contiguous or adjacent properties.

Requires installation or updates to refinery-related community air monitoring systems and fence-line monitoring systems by January 1, 2028, after a 30-day public comment period.

Mandates air districts establish pollutant monitoring lists including 18 specified pollutants (benzene, hydrogen sulfide, formaldehyde, sulfur dioxide, particulate matter, and others), with 5-year reviews and the ability to exclude pollutants if technologically infeasible.

Requires real-time public data access within 24 hours, 5-year data retention, quarterly public reports, third-party audits every two years, and notification to the public of pollutant exceedances as quickly as possible.

Requires covered facilities to initiate root cause analysis and corrective action within 24 hours of detecting exceedances, with facility owners bearing implementation costs.