A Health Risk Assessment (HRA) is a technical study that evaluates how toxic emissions are released from a facility, how they disperse throughout the community, and the potential for those toxic pollutants to impact human health. Both the South Coast AQMD and the state Office of Environmental Health Hazard Assessment (OEHHA) review HRAs submitted by facilities per the requirements of AB 2588. Facilities that submit HRAs in accordance with these requirements may also do so under the designation as a Potentially High Risk Level Facility. A Potentially High Risk Level Facility is one that has risks that may exceed the Significant Risk Level and is required to reduce risks promptly by submitting an Early Action Reduction Plan and a Risk Reduction Plan (RRP) on expedited timelines. Questions regarding health risk assessment methodology, guidelines and other AB 2588 issues should be directed to Scott Epstein, Planning and Rules Manager at (909) 396-3754 or via email at SEpstein@aqmd.gov. Also, links to risk assessment guidance from OEHHA and the South Coast AQMD are provided at the bottom of this page.
The sections below list the recently approved HRAs and related AB 2588 documents, including those for Potentially High Risk Level Facilities. Alternate HRAs are not approved by South Coast AQMD and are not allowable for determining risk levels outlined in Rule 1402.
Potentially High Risk Level Facilities
- Pre-designation Letter & Designation Letter - HRA & Approval Letter (10/9/2018) - RRP & Approval Letter (4/24/2019)
Public Notification
- Notice in English or Spanish - Presentation in English or Spanish
- Pre-designation Letter & Designation Letter - HRA, Approval Letter (10/9/2018), & Alternate HRA - RRP & Approval Letter (2/6/2020)
- Pre-designation Letter & Designation Letter - HRA & Approval Letter (6/7/2022) - RRP & Approval Letter (6/7/2022)
-Notice in English or Spanish or Vietnamese - Presentation in English or Spanish or Vietnamese
- Pre-designation Letter & Designation Letter - HRA & Approval Letter (9/27/2019) - RRP & Approval Letter (1/23/2020)
- Community Investigation - Pre-Designation Letter & Designation Letter - Amended Early Action Reduction Plan & Approval Letter (2/6/2024) - Modified HRA & Approval Letter (6/12/2024) - RRP & Approval Letter (9/12/2024)
- Community Investigation - Pre-Designation Letter & Designation Letter - Amended Early Action Reduction Plan & Approval Letter (2/22/2024)
Other Recently Approved Health Risk Assessments
- HRA & Approval Letter (8/19/2022)
- HRA & Approval Letter (1/29/2021)
- HRA & Approval Letter (9/13/2018)
- Notice in English
- Modified HRA & Approval Letter (11/6/2024) - RRP & Approval Letter (5/2/2025)
- Community Investigation - HRA Update & Approval Letter (9/9/2016)
- Notice in English or Spanish
- HRA & Approval Letter (2/22/2024) - RRP & Approval Letter (10/23/2024)
- HRA & Approval Letter (6/1/2023)
- HRA & Approval Letter (6/5/2020)
- Community Investigation - HRA & Approval Letter (3/1/2013)
- Notice in English/Spanish
- Community Investigation - HRA & Approval Letter (10/8/2015)
- HRA, Approval Letter (1/22/2019), & Alternate HRA - RRP & Approval Letter (2/18/2020)
- Notice in English - Presentation English
- HRA & Approval Letter (2/21/2018)
- Community Investigation - HRA & Approval Letter (5/8/2015) - RRP & Approval Letter (07/24/2015) - RRP Addendum (8/7/2024)
- Notice (6/18/2015) in English or Spanish - Notice (2/11/2016) in English or Spanish
- HRA & Approval Letter (9/19/2019)
- Notice in English - Presentation in English
- HRA & Approval Letter (9/13/2022)
- HRA and Alternate HRA & Approval Letter (2/7/2020)
- RRP & Approval Letter (7/20/2020)
- HRA & Approval Letter (3/3/2023) - RRP & Approval Letter (3/13/2024)
- HRA & Approval Letter (7/12/2024)
- HRA and Alternate HRA & Approval Letter (8/21/2020) - RRP & Approval Letter (9/13/2022)
- Community Investigation - HRA & Approval Letter (5/17/2016) - Updated RRP (3/21/2017) & Approval Letter (6/22/2017)
- Notice in English, Spanish, or Chinese
- HRA & HRA Approval Letter (9/24/2025)
- Notice in English and Spanish
- HRA & Approval Letter (5/22/2020)
- HRA & Approval Letter (1/2/2019) - RRP & Approval Letter (12/6/2019)
- HRA & Approval Letter (11/10/2015)
- HRA & Approval Letter (2/5/2020)
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South Coast Air Quality Management District
21865 Copley Dr, Diamond Bar, CA 91765
909-396-2000
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