Washington drug testing laws for employers: pre-employment testing rules (2026)

Washington has no general drug testing statute for private employers, so pre-employment testing is allowed, but since January 1, 2024, RCW 49.44.240 bars discrimination in initial hiring based on off-duty cannabis use or on a pre-employment test that finds only nonpsychoactive cannabis metabolites. Employers may still use valid screening that does not detect those metabolites, or a broader panel whose cannabis results are not provided to them. Listed jobs, including law enforcement, firefighters, airline and aerospace roles, and pre-identified safety-sensitive positions, are exempt, as of October 2026.

Washington drug testing rules at a glance

Does Washington have a drug testing law for employers?

Not one that sets general procedures today. Washington once had a voluntary drug-free workplace program in RCW chapter 49.82, with workers' compensation premium discounts for certified employers, but the chapter's sections expired January 1, 2001. Unlike Minnesota or Connecticut, Washington's statutes do not now prescribe a lab, a confirmation method or an applicant notice for private employers. The rule that changes pre-employment testing is the cannabis section added in 2023.

What does RCW 49.44.240 change for pre-employment tests?

Recreational cannabis has been legal in Washington since 2012, and the Legislature's finding for the 2023 law (2023 c 359) says many cannabis tests show only nonpsychoactive metabolites from use "up to 30 days in the past" that "have no correlation to an applicant's future job performance." From January 1, 2024, RCW 49.44.240(1) makes it unlawful "to discriminate against a person in the initial hiring for employment" based on:

• "the person's use of cannabis off the job and away from the workplace"; or
• "an employer-required drug screening test that has found the person to have nonpsychoactive cannabis metabolites in their hair, blood, urine, or other bodily fluids."

Subsections 2 and 4 say what is still allowed:

• Different methods. Employers may base initial hiring decisions on "scientifically valid drug screening conducted through methods that do not screen for nonpsychoactive cannabis metabolites."
• Hidden cannabis results. Employers "may require an applicant to be tested for a spectrum of controlled substances, which may include cannabis, as long as the cannabis results are not provided to the employer." This is the practical option for employers who want one standard panel across states: ask the vendor to suppress the cannabis line for non-exempt Washington jobs.
• Drug-free workplaces. The section does not affect an employer's right or obligation to maintain a drug- and alcohol-free workplace, or other rights or obligations required by federal law.
• Other kinds of tests. It does not apply to post-accident testing or testing on suspicion of impairment.

Which Washington jobs are exempt?

RCW 49.44.240(3) says the section does not apply to an applicant seeking:

1. a position requiring a federal government background investigation or security clearance;
2. a position with a general authority Washington law enforcement agency;
3. a position with a fire department, fire protection district or regional fire protection service authority;
4. another first responder position, including a dispatcher with a public or private 911 emergency communications system or a role providing emergency medical services;
5. a corrections officer position with a jail, detention facility or the Department of Corrections;
6. a position in the airline or aerospace industries; or
7. "a safety sensitive position for which impairment while working presents a substantial risk of death," which "must be identified by the employer prior to the applicant's application for employment."

The last exemption has two conditions, and both matter: the risk must be death, not just injury, and the list must exist before the person applies. A list kept with each job description, dated, is the simplest proof.

Separately, subsection 4(a) preserves state and federal laws that require applicants to be tested, or require a particular method, as a condition of employment, federal funding, federal licensing-related benefits or a federal contract.

How do the exemptions play out? An example

This is an invented example to show how the same panel request lands differently. A staffing agency receives three Washington orders on the same day, and each client asks for a standard ten-panel test including cannabis.

• Machinist for an aerospace parts manufacturer. The client is in the aerospace industry, so subsection 3(f) applies and the section does not limit the cannabis result. The agency still records why the exemption applies.
• Dispatcher for a private 911 communications center. Subsection 3(d) names dispatchers with public or private 911 systems, so this order is exempt as well.
• Picker in a grocery distribution warehouse. No industry exemption applies. The client says the job is safety-sensitive, but it has no list that predates the posting, and the hazards described are injuries rather than a substantial risk of death. The agency asks the vendor to withhold cannabis results for this order, as subsection 4(b) allows, and runs the rest of the panel as requested.

What about medical cannabis and drug-free workplace policies?

RCW 69.51A.060(7), in the medical cannabis chapter, says: "Employers may establish drug-free work policies. Nothing in this chapter requires an accommodation for the medical use of cannabis if an employer has a drug-free workplace." For applicants, the hiring limits in RCW 49.44.240 still apply to off-duty use and metabolite-only results, card or no card.

Which federal rules still apply in Washington?

• DOT testing. Commercial drivers need a verified negative controlled substances result before first performing safety-sensitive functions (49 CFR § 382.301), tested under 49 CFR Part 40, which RCW 49.44.240(4)(a) leaves untouched. Under § 40.151(e), a Medical Review Officer may not verify a marijuana positive as negative because of a state-law recommendation.
• Federal contractors. The Drug-Free Workplace Act (41 U.S.C. § 8102) requires a policy statement, an awareness program and conviction reporting; its listed requirements do not include testing.

What should staffing agencies placing workers in Washington do?

1. Collect the client's safety-sensitive list before posting. If a client wants to act on cannabis results for a job, the job must be on a list that existed before the candidate applied, and the risk must be of death.
2. Check the industry exemption. Placements with airline and aerospace employers fall under subsection 3(f); confirm the client's industry rather than the job title.
3. Configure the vendor. For non-exempt Washington orders, use a method that does not detect nonpsychoactive metabolites or have cannabis results withheld from you and the client.
4. Keep cannabis out of interviews and submittals. Off-duty use cannot drive the hiring decision, so there is nothing useful to record.

For the Fair Chance Act and the rest of Washington's hiring rules, see our Washington ban-the-box guide, Washington background check laws and Washington hiring checklist.

Checklist: before you drug test an applicant in Washington

1. Sort tested jobs into exempt (subsection 3 or required by law) and non-exempt.
2. Write and date the safety-sensitive list before posting any job you want to place on it.
3. For non-exempt jobs, choose a method without nonpsychoactive metabolites or have cannabis results withheld.
4. Test after a conditional offer and the same way for everyone offered the job.
5. Route positives through a Medical Review Officer.
6. Document the policy with the drug testing policy template; drug testing laws in hiring compares states, and California's rule is the closest match to Washington's.