California Marijuana Workplace Law: Testing Rules and Exemptions

Under California marijuana work laws, your employer cannot fire you, refuse to hire you, or otherwise penalize you because you use cannabis on your own time, away from work. Government Code Section 12954, effective January 1, 2024, added off-duty cannabis use to the protected activities under the Fair Employment and Housing Act (FEHA) and changed how employers are allowed to test for it. The law does not protect using or being impaired by cannabis at work, and several categories of jobs are exempt entirely.¹

What Off-Duty Protection Actually Covers

Section 12954 makes it unlawful for an employer to take any adverse action against you because of cannabis use off the job and away from the workplace. That covers hiring, promotions, discipline, and termination. Use cannabis at home Saturday night, show up sober Monday, and your employer has no legal ground to act on it.¹

The same statute bars employers from asking job applicants about prior cannabis use. If a background check turns up cannabis-related information, the employer generally cannot use it against you unless another state or federal law specifically allows it. Criminal history is still governed separately by the Fair Chance Act in Government Code Section 12952.¹

Drug Testing After the Law Changed

This is the biggest practical shift. Traditional urine and hair tests look for non-psychoactive cannabis metabolites, which linger in the body for days or weeks after use and say nothing about current impairment. Section 12954 prohibits employers from basing employment decisions on a drug test that finds non-psychoactive metabolites in your hair, blood, urine, or other bodily fluids.¹

Employers who want to screen for cannabis now need methods that detect active THC, the compound that actually causes impairment. Oral fluid (saliva) tests are the common compliant option because they detect active THC over a much shorter window than urine tests, closer to recent use.² Impairment-based testing is also allowed. That kind of test measures your cognitive or physical performance against your own baseline and does not look for any chemical at all. Pre-employment screening is still permitted so long as it tests for active THC rather than metabolites.

What Your Employer Can Still Do

None of this gives you a right to be high at work. The statute says outright that it does not permit an employee to possess, be impaired by, or use cannabis on the job.³ Employers can keep drug-free and alcohol-free workplace policies. They can discipline or terminate anyone who is impaired while working, whether the cannabis use was recreational or medical.

Employers also retain the right to test after a workplace incident or when there is reasonable suspicion of impairment. Federal OSHA guidance requires that post-incident testing be tied to a reasonable belief that drug use contributed to the incident, not used automatically to punish someone for reporting an injury. But if the circumstances point to impairment playing a role, testing is on the table.

Jobs Not Covered by the Law

Three categories are carved out, and if you work in any of them, off-duty protection does not apply:

Building and construction trades workers. The legislature excluded these workers due to the physical dangers of the work.¹
Positions requiring a federal background investigation or security clearance, including clearance under Department of Defense regulations or equivalent requirements from other federal agencies.¹
Positions where state or federal law requires controlled substance testing as a condition of employment, federal funding, federal licensing benefits, or a federal contract.¹

That last category is broader than most people realize. Department of Transportation safety-sensitive positions, including commercial truck drivers, airline crew, pipeline workers, and transit employees, still fall under federal drug testing rules. Federal contractors above the simplified acquisition threshold must maintain drug-free workplace programs under the Federal Acquisition Regulation, which can include testing for any controlled substance listed under federal schedules, where cannabis remains classified.⁴

Medical Cannabis Patients

Section 12954 protects “the person’s use of cannabis” without separating medical from recreational.¹ If you have a medical recommendation, your off-duty, off-site use is protected the same way an adult’s recreational use is.

Even so, your employer never has to let you use, possess, or be impaired by cannabis at work, including for medical purposes. Cannabis remains a federally controlled substance, and the Americans with Disabilities Act does not require accommodation of its use. FEHA does require employers to engage in a good-faith interactive process to find reasonable accommodations for the underlying medical condition that led to a cannabis recommendation.⁵ That might mean modified schedules or ergonomic changes, but it cannot involve on-the-job cannabis use, and it does not apply if it would cause the employer undue hardship.⁶

Filing a Complaint If Your Rights Were Violated

If your employer fires you, refuses to hire you, or otherwise penalizes you for off-duty cannabis use, you can file a complaint with the California Civil Rights Department (CRD). You have three years from the date of the discriminatory act.⁷ Miss that deadline and the claim is gone.

The process starts with an intake form through the CRD’s California Civil Rights System portal. A CRD representative conducts an intake interview to decide whether the complaint qualifies for formal investigation. If accepted, CRD prepares a formal complaint and sends it to your employer.⁸ Have the employer’s contact information, a description of what happened, any related documents, and witness names ready before you start.

You can also skip the CRD investigation and go straight to court. To do that, you first request a Right-to-Sue notice from CRD. Once you receive it, you have one year to file your lawsuit.⁹ Requesting the notice means CRD will not investigate your complaint, even if you later decide not to sue. It’s one path or the other.

What You Can Recover

A successful FEHA claim can produce:

Back pay from the date of the discriminatory action through the resolution of your case.
Front pay for future lost earnings if reinstatement is not practical.
Reinstatement or hiring into the position you were wrongfully denied.
Emotional distress damages for the psychological harm caused by the discrimination.
Punitive damages for especially egregious employer conduct.
Attorney’s fees and costs, at the court’s discretion, if you prevail.¹⁰

The fee-shifting provision matters. Many employment attorneys take FEHA cases on contingency because the statute allows the prevailing employee to recover fees from the employer. A prevailing employer can only recover fees if the court finds the lawsuit was frivolous or groundless.¹⁰ The financial risk of a good-faith claim is relatively low.

1
California Legislative Information. California Government Code Section 12954
2
California Legislative Information. AB-2188 Discrimination in Employment: Use of Cannabis
3
Civil Rights Department. Discrimination in Employment: Use of Cannabis
4
Acquisition.GOV. Subpart 26.5 – Drug-Free Workplace
5
California Legislative Information. California Government Code Section 12940
6
Civil Rights Department. Reasonable Accommodation
7
California Legislative Information. California Government Code Section 12960
8
Civil Rights Department. Complaint Process
9
Civil Rights Department. Obtain a Right to Sue
10
California Legislative Information. California Government Code Section 12965