California Health & Safety Code §§ 17920, 17920.3
Establishes minimum standards for rental apartments and other residential dwellings, including a list of conditions that render a building "substandard" to the extent that the condition "endangers the life, limb, health, property, safety, or welfare of the public or the occupants." Includes in the list "dampness of habitable rooms," as well as "visible mold growth, as determined by a health officer or a code enforcement officer… excluding the presence of mold that is minor and found on surfaces that can accumulate moisture as part of their properly functioning and intended use." Authorizes local agency inspections to ensure compliance and provides remedies. (See also Cal. Civil Code § 1941.7.)
California Health & Safety Code § 116050
Directs the Department of Public Health to establish and enforce regulations pertaining to public swimming pools. Regulations implementing the law (22 Cal. Code Regs. 65531) establish microbiological water quality standards and further provide that "the chemical quality of public pool water and indoor air quality at the public pool site and ancillary facilities shall not cause adverse physiological effects, such as irritation of the eyes, lungs, or skin of the pool users."
California Health & Safety Code §§ 39658, 39666
Requires the California Air Resources Board to establish airborne toxic control measures for toxic air contaminants. CARB regulations establish an Airborne Toxic Control Measure to Reduce Formaldehyde Emissions from Composite Wood Products (17 Cal. Code Regs. 93120 et seq.). The regulations set formaldehyde emission standards for: hardwood plywood with a veneer core (HWPW-VC) and with a composite core (HWPW-CC); particleboard; medium-density fiberboard (MDF); and thin MDF. The regulation applies to manufacturers, distributors, importers, and retailers that sell, offer for sale, or supply these materials in California, as well as to fabricators who use these materials to make other goods that are offered for sale or supplied in the state.
California Health & Safety Code §§ 41985--41986
Requires the state to adopt regulations to protect public health from ozone emitted by indoor air cleaning devices used in occupied spaces. Requires the regulations to include ozone emissions standards, testing and certification procedures for the devices, and labeling requirements for the devices. Authorizes the state to ban the sale of non-compliant devices. Regulations adopted under the law (17 Cal. Code Regs. 94800 et seq.) establish certification requirements and testing procedures, as well as labeling, notice, and recordkeeping requirements.
California Education Code §§ 17070.75, 17002(d)(1)
Requires school districts to establish a facilities inspection system to ensure schools are maintained in good repair, as a condition of receiving state school facility funds. Defines "good repair" to include interior surfaces free from water damage and showing no evidence of mold or mildew and to include functional and unobstructed HVAC systems. Requires state to develop an evaluation instrument consistent with the criteria set in the law. The Facility Inspection Tool developed by the state for use in school inspections includes several IAQ-related items that address ventilation and mold/water damage.
California Labor Code § 142.3
Authorizes the state to adopt occupational safety and health standards that are at least as effective as federal standards. Regulations promulgated under the law (8 Cal. Code Regs. 5142, 5143) apply to both private and public workplaces, such as schools. The regulations require HVAC systems to be operated continuously and inspected annually, and HVAC inspection and maintenance records to be made in writing and provided to the state and to employees upon request. Regulations also require (8 Cal. Code Regs. 5141.1) that employers take specified actions (including feasible engineering controls such as air filtration) in certain situations when employees may be exposed to wildfire smoke. Additional regulations governing general sanitation (8 Cal. Code Regs. 3362) provide that when exterior water intrusion, leakage from interior water sources, or other uncontrolled accumulation of water occurs, those conditions must be corrected because of their potential to cause the growth of mold.
California Public Resources Code §§ 25402.8, 25402.16
Requires that, when assessing energy conservation standards for residential and nonresidential buildings, the Energy Resources Conservation and Development Commission must include in its deliberations the impact that those standards would have on indoor air pollution problems. Requires the Commission to develop a strategy, by July 1, 2026, for achieving the state's goals for greenhouse gas emissions of buildings, and in doing so to "prioritize efficiency and decarbonization measures that will benefit tenants, including measures that reduce tenants' energy costs and remove indoor environmental hazards."
California Health & Safety Code § 39930

Required the Air Resources Board, in consultation with other agencies, to provide a report to the state legislature by January 2004 summarizing: the most recent empirical data on indoor air pollution; the potential adverse effects of indoor air pollution on public health; and a listing of IAQ work performed by other state or federal entities. Required that the report include a priority ranking of indoor air pollutants; an analysis of the potential health effects of indoor air pollutants; and options for mitigating health effects in schools, nonindustrial workplaces, homes, and other locations. (Report available at: https://www.arb.ca.gov/research/apr/reports/l3041.pdf.)

California Health & Safety Code § 39660.5
Requires the Air Resources Board, when evaluating the level of potential human exposure to toxic air contaminants, to assess exposure in indoor environments as well as in ambient air conditions. Requires the Board to coordinate with other state agencies.
California Health & Safety Code § 39619.6

Required the Air Resources Board and the Department of Public Health to conduct a comprehensive study and review of the environmental health conditions in portable classrooms. Directed the study to include a review of design and construction specifications; a review of school maintenance practices; an assessment of IAQ; and an assessment of potential toxic contamination, including mold contamination. Required the study to address the need for modified design and construction standards; emission limits for building materials and classroom furnishings; and other mitigation actions to ensure the protection of children's health. (Report available at: https://ww2.arb.ca.gov/resources/documents/california-portable-classrooms-study.)

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