Moss Landing Air: What were the results of EPA's air monitoring from January 17 to 20?
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- Particulate matter (PM2.5 and PM10)
EPA’s monitoring showed concentrations of particulate matter to be consistent with the air quality index throughout the Monterey Bay and San Francisco Bay regions, with no measurements exceeding the moderate air quality level. - Hydrogen fluoride gas
Hydrogen fluoride gas was measured at one second intervals and there were no exceedances of California’s human health standards.
Post-Fire
- The initial fire subsided on January 18, 2025.
- On January 20, after smoke subsided, EPA consulted with Monterey County and transferred air monitoring stations to Vistra.
- Vistra continued air monitoring at the property and in the community. The data is being provided to the county.
Related Questions
- Moss Landing Air: What air monitoring activities did you do during the January fire response?
- Moss Landing Air: What did you test for during the fire?
- Moss Landing Air: What air monitoring technology did you use?
- Moss Landing Air: Are you requiring any air monitoring or sampling during Vistra’s battery removal work?
- Moss Landing Air: Is there a difference between air monitoring and air sampling?
- Moss Landing Air: What particulate sizes did EPA monitor during the initial response in January?
- Moss Landing Air: Can you detect nanoparticles in the air with the instrumentation you used during the initial response?
- Moss Landing Air: What happened with the spike in particulate matter at air monitoring station 9 the morning of January 18, which resulted in a 1.275 mg/m3 reading for PM10?