California Asbestos Laws: Disclosures, Notifications, and Penalties

California asbestos laws layer strict state requirements on top of federal rules, and they reach almost everyone who touches an older building: owners, employers, licensed contractors, landlords, and home sellers. The core obligations are to find asbestos before disturbing it, notify the people who could be exposed, use licensed workers and permitted disposal, and warn buyers and tenants when you know it is there. Violations draw citations from Cal/OSHA, air district fines, hazardous waste penalties from the Department of Toxic Substances Control (DTSC), and, in serious cases, federal criminal prosecution.

Which Laws Apply and Who Enforces Them

Federal law sets the floor. The Clean Air Act, the Asbestos Hazard Emergency Response Act, and the National Emission Standards for Hazardous Air Pollutants (NESHAP) at 40 CFR Part 61, Subpart M govern demolition, renovation, and school inspections.¹

California adds three separate regulatory tracks on top of that:

Title 17 of the California Code of Regulations contains the Airborne Toxic Control Measure (ATCM) for construction, grading, quarrying, and mining that could disturb asbestos. The California Air Resources Board (CARB) administers it through local air quality management districts.²
Title 8, Section 1529 of the CCR sets workplace safety rules, including exposure limits, engineering controls, training, and medical monitoring. Cal/OSHA enforces it.³
Title 22 of the CCR regulates asbestos as a hazardous waste and sets treatment and disposal standards. DTSC enforces it.⁴

City and county jurisdictions handle a separate slice: the pre-1979 building notice under Health and Safety Code Section 25915 is enforced locally, not by Cal/OSHA.⁵

What Building Owners Must Do

Owners of buildings built before 1979 who know the building contains asbestos must give written notice to every employee working there. The notice has to identify where the asbestos-containing materials (ACMs) are located, describe any handling restrictions needed to keep them undisturbed, and name a contact person if the condition of the material changes.⁶

Cal/OSHA layers a second duty on top. Before any work starts in a building, the owner must determine where ACMs or presumed ACMs are and how much material is present, then notify in writing every prospective employer bidding on the job, every employer whose workers will be in or near the material, its own employees in those areas, and tenants who will occupy affected spaces.⁵ Missing the notice exposes the owner both to regulatory citations and to civil suits by workers or tenants who are later diagnosed with an asbestos-related disease.

Where ACMs are present but intact, an operations and maintenance plan is the standard approach: warning signs in affected areas, records of inspections, and rules to prevent disturbance. When the material starts to deteriorate, a licensed asbestos contractor must handle abatement.

Proposition 65 Warnings

Asbestos has been listed under Proposition 65 as a known carcinogen since 1987, and the no-significant-risk level for inhalation is 100 fibers per day.⁷ A business that exposes people above that level without a clear and reasonable warning can be sued under Prop 65, with penalties of up to $2,500 per day per violation. For properties with known ACMs where occupants or visitors could be exposed, that translates into a posting requirement.

Contractor Licensing

Under Business and Professions Code Section 7058.5, no contractor may perform asbestos abatement involving 100 square feet or more of ACMs without holding a C-22 Asbestos Abatement license. The person qualifying for the license has to pass an asbestos certification exam given through the Contractors State License Board.⁸ C-22 licensees also have to register with the Division of Occupational Safety and Health (DOSH) and meet the training rules in Title 8, Section 1529.⁹

A narrow carve-out exists. Contractors working with asbestos cement pipe, vinyl asbestos floor materials, or asbestos bituminous or resinous materials do not have to pass the asbestos certification exam.⁸

Asbestos consultants and site surveillance technicians are regulated separately under Business and Professions Code Section 7180, and they cannot work in those roles without DOSH certification.¹⁰ Hiring an uncertified person for any of these jobs puts both the worker and the hiring party on the hook.

What Employers Owe Their Workers

Cal/OSHA’s permissible exposure limit is 0.1 fibers per cubic centimeter of air, averaged over an eight-hour period. Before asbestos-related work starts, the employer has to run an initial exposure assessment. If levels meet or exceed the PEL, engineering controls become mandatory: HEPA-filtered local exhaust, enclosure of dust-generating processes, and ventilation that moves contaminated air away from workers’ breathing zones.³

On top of controls, employers must train workers, supply respirators and other personal protective equipment, set up regulated work areas with restricted access, monitor air throughout the project, and take corrective action when readings exceed limits.

Medical Surveillance

Employers must provide medical surveillance to any employee doing Class I, II, or III asbestos work for 30 or more days in a year, and to any employee exposed at or above the PEL. The first exam has to happen before the employee is assigned to an area requiring a negative-pressure respirator, and within 10 working days after the 30th day of qualifying exposure. Annual exams follow, plus a termination exam for anyone who was exposed at or above the PEL. Every exam and consultation runs under a licensed physician’s supervision and at no cost to the worker.³

Short jobs get a break. Days spent on Class II or III work on intact material for one hour or less, using all required work practices, do not count toward the 30-day threshold.

Notification Before Demolition or Renovation

Before any demolition or renovation that involves ACMs, the owner or operator has to inspect the affected areas thoroughly, covering both friable and nonfriable materials.¹ Written notice then goes to the local air quality management district, which acts as EPA’s delegated authority in California.

Timelines are set locally. The South Coast Air Quality Management District’s Rule 1403 requires the notification to be postmarked at least 10 working days before demolition begins, and it requires four steps in order: an asbestos survey, asbestos removal, district notification, and a building and safety demolition permit.¹¹ Other districts run similar procedures with their own forms. Skipping the survey or starting work before the notification window closes is one of the most frequently cited violations, and it can trigger both civil fines and criminal referrals.

Real Estate Disclosure to Buyers

Federal law does not require home sellers to disclose asbestos.¹² California does. The Real Estate Transfer Disclosure Statement, required by Civil Code Sections 1102 through 1102.3, asks sellers whether they know of environmental hazards on the property and lists asbestos as an example.¹³

The duty is knowledge-based. Sellers do not have to hire an inspector or test before selling, but a seller who actually knows about ACMs and checks “No” on the TDS is filing a false disclosure, and buyers can sue after closing. Buyers of pre-1979 buildings often arrange independent inspections for that reason, because a seller who genuinely does not know has nothing to disclose.

Naturally Occurring Asbestos

California has extensive deposits of naturally occurring asbestos in ultramafic rock formations, particularly in the Sierra Nevada foothills, the Coast Ranges, and parts of Southern California. Any construction, grading, quarrying, or surface mining in these areas is subject to the ATCM at Title 17, Section 93105.²

The rule applies wherever the area to be disturbed sits in a geographic ultramafic rock unit or is otherwise known to contain naturally occurring asbestos. Compliance generally means dust control, air monitoring, and notice to the local air district. Developers who plan projects in these geologies should check geologic maps early. Finding asbestos mid-project can freeze construction and drive up abatement costs.

Tenant Protections

Landlords have to keep rentals habitable, and that duty extends to asbestos. When a landlord knows about deteriorating ACMs that could release fibers, the law expects reasonable steps to protect tenants, whether by encapsulation, professional abatement, or at minimum keeping tenants out of affected areas until the hazard is addressed.

Tenants who suspect a problem can ask their local air quality management district or county health department to inspect. These agencies can compel compliance, and a confirmed violation typically forces remediation. Tenants who suffer health consequences from undisclosed or unaddressed asbestos may also have grounds for a civil lawsuit.

Reporting a Suspected Violation

The right agency depends on the problem.

For abatement and air quality complaints, contact the local air quality management district. Districts accept complaints online, by phone, or in writing, and anonymous submissions are generally accepted.
For unsafe asbestos handling at work, missing protective equipment, or no training, file with Cal/OSHA.
For illegal dumping of asbestos waste, report to DTSC.

Retaliation against employees who report asbestos violations is prohibited under California labor law. Workers who face retaliation can file a separate complaint with Cal/OSHA or the Labor Commissioner.

Penalties for Getting It Wrong

Cal/OSHA Civil Penalties

Cal/OSHA updates its penalty schedule every year. The 2025 maximums are $25,000 for a serious violation and $162,851 for a willful or repeat violation, with a minimum of $11,632 for willful violations.¹⁴ Those figures typically tick up when the annual adjustment publishes. Cal/OSHA can also issue work-stop orders that shut down a job site until violations are corrected, and the downtime often costs more than the fine.

Federal Criminal Penalties

Knowing violations of the asbestos NESHAP during demolition or renovation are federal crimes under 42 U.S.C. § 7413(c)(1). The maximum sentence is five years in prison and the fine set by 18 U.S.C. § 3571, which allows up to $250,000 for an individual. Penalties double on a second or subsequent conviction.¹⁵ Federal prosecutors have used these provisions in California: in one case, a developer who failed to provide EPA with required demolition notice and improperly removed asbestos from a facility in Clarksburg pleaded guilty and faced up to five years in prison and a $250,000 fine.¹⁶

Hazardous Waste Violations

Illegal dumping of asbestos waste is prosecuted under Chapter 6.5 of the Health and Safety Code. Knowing disposal at unpermitted sites brings substantial fines and state prison exposure. DTSC and local prosecutors pursue these cases especially hard when contamination reaches residential areas or water sources.

Federal Chrysotile Deadlines That Still Affect California Businesses

In March 2024, the EPA finalized a rule under the Toxic Substances Control Act banning chrysotile asbestos, the most commonly used form of the mineral. Most of the phased deadlines have already passed, but two still matter for California operations that use legacy asbestos products.¹⁷

On May 27, 2026, the manufacture, import, processing, and distribution of sheet gaskets used in chemical production is prohibited. Sheet gaskets already installed and in use before that date are exempt from the distribution and commercial use prohibitions.¹⁸ On May 28, 2029, commercial use of chrysotile sheet gaskets for titanium dioxide production and nuclear material processing ends, with a longer runway (until December 31, 2037) for the Department of Energy’s Savannah River Site. Businesses still relying on chrysotile products should confirm they either fit one of the exceptions or have already switched to alternatives, and workplace safety measures are required during any phaseout period longer than two years.

1
eCFR. 40 CFR 61.145 – Standard for Demolition and Renovation
2
Legal Information Institute. California Code of Regulations Title 17, Section 93105 – Asbestos Airborne Toxic Control Measure for Construction, Grading, Quarrying, and Surface Mining Operations
3
California Department of Industrial Relations. California Code of Regulations, Title 8, Section 1529 – Asbestos
4
Legal Information Institute. California Code of Regulations Title 22, Section 66268.114 – Treatment Standard for Asbestos-Containing Waste
5
Cal/OSHA. Asbestos Information
6
California Legislative Information. California Health and Safety Code Section 25915
7
OEHHA. Asbestos – Proposition 65
8
California Legislative Information. California Business and Professions Code Section 7058.5
9
Legal Information Institute. California Code of Regulations Title 16, Section 832.22 – Asbestos Abatement Contractor
10
California Legislative Information. California Business and Professions Code Section 7180
11
SCAQMD. Instructions for the Asbestos Demolition Notification Form – Rule 1403
12
US EPA. Does a Home Seller Have to Disclose to a Potential Buyer That a Home Contains Asbestos?
13
California Department of Real Estate. Disclosures in Real Property Transactions – RE 6
14
California Department of Industrial Relations. Cal/OSHA Increases Civil Penalty Amounts for 2025
15
US EPA. Criminal Provisions of the Clean Air Act
16
US Environmental Protection Agency. California Man Pleads Guilty to Asbestos Violation
17
US EPA. Risk Management for Asbestos, Part 1 – Chrysotile Asbestos
18
Federal Register. Asbestos Part 1 – Chrysotile Asbestos – Regulation of Certain Conditions of Use Under the Toxic Substances Control Act