California Air Resources Board

HARP Bulletins

• 10/02/25 - Health database update: Name changes for two isocyanate-containing substances
• 08/18/25 - Health database update: New RELs for four substances with isocyanate functional groups
• 07/21/25 - Health database update: New acute and 8-hour RELs, and a revised chronic REL for p-dichlorobenzene
• 01/03/25 - Notice of Adoption of Cancer Inhalation Unit Risk Factor for Isoprene
• 10/31/24 - Census database update for the ADMRT
• 8/2/24 - CEIDARS Utility Database Update for the EIM
• 7/19/24 - CEIDARS utility database update for the EIM
• 10/9/23 - Health database update: New acute, 8-hr, and chronic RELs for trimethylbenzenes
• 8/7/23 - Health database update: Revised cancer inhalation unit risk factor for cobalt sulfate heptahydrate and water-soluble cobalt compounds
• 5/1/23 - Health database update: New acute, 8-hr, and chronic RELs for 1-bromopropane
• 4/4/23 - CEIDARS utility database update for the EIM
• 2/24/23 - CEIDARS utility database update for the EIM
• 12/13/22 - Health database update: New cancer inhalation unit risk factor for 1-bromopropane
• 9/9/22 - Health database update (see bulletin for details)
• 6/10/22 - CEIDARS utility database update for the EIM
• 4/29/22 - HARP software update for the ADMRT (dated 22118) and RAST (dated 22118)
• 4/22/22 - HARP software update for the ADMRT (dated 22094) and RAST (dated 22094)
• 1/21/22 - Health database update: Minor correction to the target organ flag for oleum
• 9/23/21 - HARP software update for the EIM (v2.1.6)
• 8/11/21 - Health database update: Correction to the 8-hr REL for arsenic (POLID 1016)
• 4/2/21 - HARP software update for the ADMRT (dated 21081), RAST (dated 21081), and EIM (v2.1.5)
• 2/22/21 - CEIDARS utility database update for the EIM
• 10/5/20 - Health database update: New cancer inhalation unit risk factor for cobalt
• 8/21/20 - Health database update: New acute, 8-hr, and chronic RELs for toluene
• 7/10/20 - CEIDARS utility database update for the EIM
• 2/12/20 - CEIDARS utility database update for the EIM
• 9/20/19 - Health database update: New acute, 8-hr, and chronic RELs for 1,6-hexamethylene diisocyanate (HDI)
• 7/30/19 - CEIDARS utility database update for the EIM
• 7/2/19 - CEIDARS utility database update for the EIM
• 6/18/19 - CEIDARS utility database update for the EIM
• 5/13/19 - HARP software update for the ADMRT (dated 19121)
• 2/22/19 - HARP software update for the ADMRT (dated 19044) and RAST (dated 19044)
• 8/21/18 - Health database update: New cancer inhalation unit risk factor for tertiary-butyl acetate
• 6/12/18 - HARP software update for ADMRT (dated 18159) and RAST (dated 18159)
• 5/15/18 - Health database update: New acute, 8-hr, and chronic RELs for ethylene glycol mono-n-butyl ether
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