Skip to main content

Oregon State Flag An official website of the State of Oregon » Homepage Search Site

Community Right to Know - Statutes and Rules

Oregon Revised Statute (ORS) 453.307 to 453.505

Oregon Administrative Rules (OAR) Chapter 837, Division 85

Oregon Administrative Rules (OAR) Chapter 837, Division 90

Extremely Hazardous Substances (EHS)

These substances are regulated by the Environmental Protection Agency (EPA). Facilities that possess a threshold planning quantity (TPQ) of an EHS are subject to federal emergency planning requirements. TPQs are calculated based on the aggregate amount of an EHS substance at the facility at one time. Facilities in Oregon are required to identify whether or not they are subject to these requirements on the Oregon hazardous substance inventory report. 

More information about EHS:

OSHA Hazard Classifications

Federal law requires facilities to identify physical and health hazard classifications adopted by Occupational Safety and Health Administration's (OSHA) Hazard Communication Standard. Facilities will report the hazard classifications for each reported hazardous substance as listed on the safety data sheets (SDS). These classifications will be identified by the CHS Manager, and facilities will check the appropriate classification(s). These will include explosives, radioactive, poisonous, and etiological classifications, which, if selected, will prevent the disclosure of the substance to the public.


Hazardous Substance Information Hotline:
503-378-6835 or 800-454-6125


Community Right to Know (CR2K) Helpdesk