Can Employers Drug Test for Weed in California? AB 2188, What Tests Are Still Allowed and the Exceptions

Updated 29 Oct 2026 · Written by Daniel Brooks · Medically reviewed by Dr. Maya Chen, PharmD

If you live in California and have a job offer or a drug test coming up, the short answer is: yes, California employers can still drug test, but most of them can no longer hold off-duty weed use against you, and they can't act on a test that only finds the inactive THC metabolite. That change came from Assembly Bill 2188, which took effect on January 1, 2024. It didn't make cannabis a free pass at work, and it doesn't cover every job. Construction trades, jobs that need a federal background check or security clearance, and federally required testing like DOT are carved out. This guide explains what the law actually says, which tests still count, who's exempt, what changed for job interviews under SB 700, and how to work out where you stand before test day.

Quick note: this is general information, not legal advice, and laws can change. If your job is on the line, check with California's Civil Rights Department or an employment lawyer. Nothing here applies to DOT, FAA, federal, military, court, probation or parole testing.

The short answer

California employers can still:

• Have a drug-free workplace policy and ban cannabis at work.
• Discipline or fire someone who is impaired on the job.
• Use tests that look for active THC, which points to recent use, rather than the long-lasting metabolite.
• Test and act on results in exempt jobs, such as building and construction trades or roles that need a federal background investigation.
• Follow federal testing rules where federal law requires them.

Most California employers can't:

• Refuse to hire, fire or penalize you for using cannabis off the job and away from work.
• Act on a test result that only shows nonpsychoactive cannabis metabolites, the THC-COOH that standard urine and hair tests measure.
• Ask job applicants about their past cannabis use (that's SB 700).

The practical upshot is that a standard urine cup that comes back positive only for THC-COOH shouldn't, by itself, cost you a typical California job. A saliva or blood test that finds active THC is a different story, because it can suggest recent use.

What AB 2188 actually changed

Before 2024, recreational cannabis had been legal for adults in California since Proposition 64 in 2016, but employers could still refuse to hire someone who tested positive. Courts had also said employers didn't have to accommodate medical cannabis use. AB 2188 added a new section to the Fair Employment and Housing Act, Government Code section 12954, which makes it unlawful for an employer to discriminate against a person in hiring, firing or any term of employment because of:

1. The person's use of cannabis off the job and away from the workplace, or
2. An employer-required drug screening test that found nonpsychoactive cannabis metabolites in the person's hair, blood, urine or other bodily fluids.

The reasoning behind the law is simple science. THC-COOH, the main metabolite in urine tests, is inactive. It can linger for days or weeks after use, long after any effect is gone, so a positive tells an employer what you did last weekend, not whether you're impaired now. The legislature decided that wasn't a fair basis for employment decisions in most jobs.

What it didn't change

The law says plainly that it doesn't let anyone be impaired by, possess or use cannabis on the job. Employers keep the right to keep workplaces drug-free. If you show up high, or use at work, AB 2188 won't protect you. It also doesn't stop employers from testing altogether. It changes what a test can be used for.

Which tests can California employers still use?

This is where most confusion comes from. Here's how the common test types line up with the law.

California's Civil Rights Department has published a cannabis FAQ for employers and workers. It explains that employers can still use tests that don't screen for nonpsychoactive metabolites, and it gives oral fluid tests that look for THC as an example. That's why more California employers have moved toward mouth swabs for cannabis. A swab mainly reflects the last 24 to 72 hours, which lines up more closely with possible impairment.

Can they still test my urine?

Yes, employers can still order multi-panel urine tests, because those tests also screen for cocaine, opioids, amphetamines and other drugs that AB 2188 doesn't cover. What a covered employer can't do is take action because the THC panel shows metabolites only. Some employers simply drop the THC panel from their California urine tests to avoid the issue.

Who isn't protected: the exceptions

AB 2188 doesn't apply to every job. The main exceptions are:

• Building and construction trades. The law expressly doesn't apply to employees in these trades.
• Jobs that need a federal background investigation or security clearance under federal regulations.
• Federally required testing. If a federal law, regulation or condition of federal funding, licensing or contracts requires testing, the state law doesn't override it. That includes DOT-regulated drivers, pilots, rail and transit workers.

Cannabis is still illegal under federal law, so federal employees and federally regulated safety jobs follow federal rules no matter where you live. If your job falls in one of these categories, a positive THC test, including a metabolite-only result, can still have consequences. We don't cover ways around federally regulated tests, and you shouldn't try.

Safety-sensitive jobs outside those exceptions

Many jobs feel safety-sensitive, such as warehouse forklift work or hospital roles, but aren't in the listed exceptions. For those, the AB 2188 protections generally still apply to off-duty use and metabolite-only tests, while the employer can still act on impairment or on tests for active THC. If you're unsure where your role falls, ask HR what kind of test it is and what policy applies to California staff.

SB 700: interview questions about cannabis

A companion law, Senate Bill 700, also took effect on January 1, 2024. It makes it unlawful for most employers to ask job applicants about their prior cannabis use. It also limits using information about a person's past cannabis use from their criminal history, unless another law allows or requires it. The same exceptions as AB 2188 apply. So in a typical California interview, "Do you smoke weed?" is a question the employer shouldn't be asking.

Pre-employment vs current employees

California has long been stricter than many states about testing current employees, because the state constitution protects privacy. In Loder v. City of Glendale (1997), the California Supreme Court upheld suspicionless pre-employment testing of job applicants but rejected blanket testing of current employees up for promotion. Since then, random testing of current employees has generally been limited to safety-sensitive jobs, and reasonable-suspicion testing has been the norm otherwise. Some cities add their own rules; San Francisco, for example, has a long-standing local ordinance restricting employee drug testing.

AB 2188 sits on top of all that. Even where a test is allowed, a covered employer can't act on metabolite-only cannabis results or off-duty use.

What about medical cannabis cards?

Before AB 2188, a medical card didn't protect you at work in California. The state Supreme Court said in 2008 that employers didn't have to accommodate medical cannabis use. Now, off-duty use is protected for covered jobs whether or not you have a card, so the card matters less for most workers. It still won't help in the exempt categories or with federally required tests, and it doesn't allow use or impairment on the job.

How to work out where you stand

1. Find out the job category

Is it construction trades, a federal-clearance role, or a DOT-regulated position? If so, assume a THC positive will count. If not, AB 2188 likely protects off-duty use.

2. Ask what kind of test it is

It's normal to ask HR or the recruiter whether the test is urine, saliva, hair or blood, and whether it's a lab test. A saliva test for THC is the one most likely to matter for a covered California job, because it can reflect recent use.

3. Think about timing, not tricks

Because saliva tests mainly catch the last day to three days, the simplest approach for an occasional user is to stop well ahead of the test. Heavy daily users can test positive on saliva for longer, so give yourself more time. Avoid any product or trick that could make your sample look tampered with; an adulterated or substituted sample is usually treated as a refusal, and that's not protected by AB 2188.

4. Check yourself at home

A home saliva or urine THC test bought ahead of time can tell you where you stand, so you're not guessing. Use it a day or two before the real test, read the result at the exact time in the instructions, and remember that on most strips any line in the test zone, even a faint one, means negative.

If you think an employer broke the law

If a covered California employer refused to hire you or fired you only because of off-duty use or a metabolite-only THC result, you may have a claim under FEHA. Keep copies of the offer, the test notice, the result and any messages explaining the decision. You can file a complaint with the California Civil Rights Department, and there are time limits for doing so, so don't wait too long. An employment lawyer can tell you whether your job falls under an exception.

Many employers simply haven't updated old policies, especially national companies using a standard test panel everywhere. Pointing HR to AB 2188 politely is often the quickest fix.

Common California myths

• "Weed is legal here, so employers can't test for it." They can still test. What changed is what they can do with metabolite-only results and off-duty use.
• "AB 2188 lets me use at work." No. Possession, use and impairment on the job can still get you fired.
• "It covers every job in California." Construction trades, federal-clearance jobs and federally required testing are exempt.
• "Saliva tests are banned now." They aren't. Tests for active THC are generally allowed.
• "A medical card makes me untouchable." It doesn't change the exceptions or impairment rules.

Help if you want to cut back

If cannabis has started to feel like more than a choice, free, confidential help is available. The SAMHSA National Helpline is open 24/7 at 1-800-662-4357. If you're in crisis or thinking about harming yourself, call or text 988.

This page is general information, not legal or medical advice. We don't encourage cheating any drug test. Tampering with a drug test may be illegal and can count as a refusal or failed test. Never try to beat DOT, FAA, federal, military, court, probation or parole testing. The only guaranteed way to pass is not to use.