California Health and Safety Code 39047.2 – “PM2.5” means particulate matter 2.5 microns and smaller in size.
Current as of: 2024 | Check for updates
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“PM2.5” means particulate matter 2.5 microns and smaller in size.
(Added by Stats. 1999, Ch. 477, Sec. 1. Effective January 1, 2000.)