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The acute 1-hour Reference Exposure Level (REL) for Hydrogen Sulfide (H2S) established by California Office of Environmental Health Hazard Assessment (OEHHA) is 30 ppb. The state-level standard for H2S is also 30 ppb. The OEHHA REL is 8 ppb for Benzene, 1,300 ppb for Isopropyl Alcohol, 1,300 ppb for Toluene, 4,500 ppb for 2-Butanone, 5,000 ppb for m,p-Xylene, and 21,000 ppb for Methanol.
Acrolein data is available at MS-03 and MS-06 from March 18th through April 10th, and it is available at MS-10 and MS-12 starting April 10th. However, while Acrolein data is available, DMS and Ethanol data is unavailable. We are working to remedy the issue and expect a solution by Fall 2025.
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Air Monitoring Notification System
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