NOTICE OF PUBLIC HEARING REGARDING THE AB2588 AIR TOXICS “HOT SPOTS” PROGRAM
NOTICE IS HEREBY GIVEN, that Wednesday, December 10, 2025, at 9:00 a.m. has been set as the date and time to hold a public hearing to present the 2025 Annual Report for the Air Toxics “Hot Spots” Program and provide the public with an opportunity to comment.
The Air Toxics “Hot Spots” Information and Assessment Act of 1987 (AB 2588) is a State of California public right-to-know law enacted to address public health risks from toxic air contaminants emitted by stationary sources. The Act requires the District to collect information about the location, type, and quantity of toxic compounds emitted into the air from specified local businesses and industry, and evaluate the toxic emissions to determine which facilities may present public health concerns.
The report describes the current evaluation statuses, priorities, and risk categories for facilities subject to the program, pursuant to California Health and Safety Code Section 44363, and is published to provide the public with information regarding the District’s AB 2588 Program.
Yolo-Solano AQMD’s Air Toxics Hot Spots Program requires certain facilities with the potential to emit certain amounts of toxic air pollutants to submit emissions inventories to the District and, in some cases, pursue risk reduction strategies.
The program is aimed at providing the public with information about potential health impacts from toxic air pollutants routinely emitted by facilities.
Districtwide Re-evaluation
The Office of Environmental Health Hazard Assessment (OEHHA) revised the Air Toxics Hot Spots Program Guidance Manual for the Preparation of Risk Assessments on March 6, 2015. The net result is that the calculated risk estimates for many sources have increased.
As a result of the change to the methodology, the District will be re-evaluating all facilities subject to the Hot Spots program. The District held a public workshop on November 10, 2015 to discuss these changes. The District is sending out invoices to affected facilities, and will be collecting information necessary to calculate the prioritization scores for each facility. If your facility is determined to be ‘low priority’ or ‘low risk’, there will be no additional invoices in future years.
Annual Report
State law requires districts to produce annual reports detailing local Air Toxics Hot Spots Program activities and facility listings.
Background
The Air Toxics “Hot Spots’ Program was enacted by state law (AB 2588) in 1987. The purpose of the law is to provide the public with information about the routine emissions and potential health impacts of toxic pollutants released to the air by facilities.
Certain facilities are subject to the program, and are required to submit a toxic emissions inventory. With that data, the District calculates a prioritization score for each facility. Depending on the prioritization score, some facilities are required to perform a health risk assessment.
Amendments to Air Toxics Reporting Programs
On January 1, 2022, the California Air Resources Board (CARB) adopted amendments to the Criteria and Toxics Reporting (CTR) Regulation. This amendment requires all facilities that emit more than 10 tons per year of any criteria air pollutant, except for carbon monoxide, to report annual emissions of criteria pollutants and toxics to CARB beginning with 2024 emissions data reported in 2025. Additionally, the amendment requires certain facility types, or facilities that use certain fuels or chemicals, to also report. These reporting facilities will be phased into the reporting requirements over the next five years.
On March 21, 2022, CARB also made effective amendments to the AB 2588 Air Toxics “Hot Spots” Emission Inventory Criteria and Guidelines Regulation (EICG). This amendment added to the list of chemicals that must be reported under the EICG and under Appendix E, adds the same facility types, or facilities that use certain fuels or chemicals, to align with the CTR Regulation above, including the phase in schedule. The EICG differs from CTR in that facilities subject to this regulation are also subject to the District fee Rule 4.9.
District Staff with work with facilities subject to CTR and the EICG to incorporate the requirements of this regulation into the annual throughput reporting currently collected.
