US lawIndianaRegulationsTitle 410 — Indiana Department of HealthArticle 33 — ARTICLE 33. INDOOR AIR QUALITYRule 1 — Definitions33-1-7410 IAC 33-1-7410 IAC 33-1-7 "ppm" definedLast amended: 2023Year: 2027Length: 7 wordsOfficial source Cite as Ind. Admin. Code tit. 410, r. 33-1-7Sec. 7. "ppm" means parts per million.Previous410 IAC 33-1-6Next410 IAC 33-1-8