{"code":"HSC","codeName":"Health and Safety Code","section":"39047.2","citation":"Health & Saf. Code, § 39047.2","status":"in-force","lawOn":"2026-09-28","headings":[{"name":"DIVISION 26. AIR RESOURCES [39000. - 44475.3.]","url":"https://blackletter.si/health-and-safety-code/division-26"},{"name":"PART 1. GENERAL PROVISIONS AND DEFINITIONS [39000. - 39060.]","url":"https://blackletter.si/health-and-safety-code/division-26/part-1"},{"name":"CHAPTER 2. Definitions [39010. - 39060.]","url":"https://blackletter.si/health-and-safety-code/division-26/part-1/chapter-2"}],"history":"Added by Stats. 1999, Ch. 477, Sec. 1.   Effective January 1, 2000.","effective":"2000-01-01","html":"<p>“PM2.5” means particulate matter 2.5 microns and smaller in size.</p>","text":"“PM2.5” means particulate matter 2.5 microns and smaller in size.","otherVersions":[],"url":"https://blackletter.si/health-and-safety-code/definitions-39047-2","source":"California Legislative Information bulk export (pubinfo)"}