Air Toxics "Hot Spots" Program (AB 2588)

What's New in AB 2588      

  1. HARP training coursesLink to external website. are available with CARB.

  2. South Coast AQMD AB 2588 Guidance Documents

    - AB 2588 Facility Prioritization Procedures (Sept 2019, PDF, 2.8 MB)
    - AB 2588 Supplemental Guidelines (Sept 2018, PDF, 1 MB)
    - AB 2588 Voluntary Risk Reduction Plan Guidelines (Sept 2018, PDF, 762 KB)
    - Template for Emission Factors Reference Sources Table (.xlsx, 14 KB)
    - Public Notification Procedures (Oct 2016, PDF, 949 KB)
    Quadrennial Air Toxics Emissions Reporting Procedure (Dec 2016, PDF, 820 KB)

  3. 2018 AB 2588 Annual Report (September 2019, PDF, 3.1 MB)

In 1987, the California legislature adopted the Air Toxics “Hot Spots” Information and Assessment ActLink to external website..  The goals of the Act are to collect emissions data of toxic air contaminants, identify facilities having localized impacts, to determine health risks, and to notify affected individuals.   Exposure to toxic air contaminants may produce various adverse health impacts.

There are seven important components to the program as follows:


Emissions Reporting Facilities submit an air toxics inventory through the Annual Emissions Report (AER) Program.


Prioritization From the reported toxic emissions, South Coast AQMD prioritizes facilities, using a procedure approved by the Governing Board, into three categories: high priority, intermediate priority, and low priority.


Risk Assessments Potentially high risk facilities must prepare a health risk assessment.


Public Notification If the risk reported in the HRA exceeds specific thresholds, then the facility is required to provide public notice to the affected community.


Risk Reduction Facilities with health risks above the action risk levels in Rule 1402 must reduce their risks to the community.


Industry-wide Source (IWS) Smaller or “IWS” facilities are identified in California H&SC, Section 44323. 



Fees State and local costs of implementing the Act are covered through annual fees.

Forms required by various aspects of the program are available for download.

For more information about AB 2588 program please contact AB 2588 Staff or AB 2588 Hotline at 909-396-3616.

Newsletter Sign Up
Periodic newsletter updates via Email on a variety of air quality-related topics

South Coast Air Quality Management District

21865 Copley Dr, Diamond Bar, CA 91765



© 2019 South Coast Air Quality Management District