Arizona Pre-Employment Drug Testing Laws: Policy, Notice, and Marijuana

Arizona pre-employment drug testing laws let employers screen job applicants, but only if the employer maintains a written policy, tells applicants in advance that testing is required, and keeps results confidential. The rules live in the Arizona Drug Testing of Employees Act, ARS 23-493 through 23-493.12. Nothing in the statute forces an employer to test. What the statute does is set the conditions employers must meet to test lawfully and to keep the good-faith immunity that shields their hiring decisions from lawsuits.

If you are an applicant, the same rules tell you what to expect: notice before the test, a defined list of substances, a chance to explain a positive result, and confidential handling of what the lab finds.

The Written Policy Employers Must Have

Before administering a single test, an Arizona employer must have a written drug-testing policy in place. ARS 23-493.04 requires the policy to be distributed to every employee subject to testing or made available the same way the employer communicates other personnel practices, such as through a handbook or a posted notice.¹ Prospective employees must be told they will need to undergo drug testing.

The statute lists ten items the policy must address:

The employer’s position on drug and alcohol use.
Which employees or applicants are subject to testing.
The circumstances that will trigger a test.
The specific substances the employer will screen for.
The testing methods and sample-collection procedures.
What happens if a person refuses to test.
What employment consequences may follow a positive result.
The tested person’s right to obtain written results on request.
The right to explain a positive result in a confidential setting.
How the employer will keep results confidential.

The list is not decorative. The good-faith immunity that the Act provides only applies when the employer has “established a policy and initiated a testing program in accordance with this article.”² An employer that skips a required element, or fails to distribute the policy, has a harder time defending a rescinded offer or a terminated hire.

Notice, Consent, and Refusal

Arizona does not require applicants to sign a written consent form before a pre-employment drug test. The statute requires only that the employer “inform prospective employees that they must undergo drug testing” and make the written policy available.¹ Once an applicant continues through hiring after that notice, participation is treated as implied consent.

Most employers still ask applicants to sign an acknowledgment. A signature creates a paper trail showing the applicant received and reviewed the policy, which makes compliance easier to prove if a dispute arises. If an applicant refuses the test after proper notice, the employer can withdraw the offer without legal exposure.

What Employers Can Test For

Arizona law does not mandate a specific panel of substances. The statute requires only that the written policy identify which drugs will be screened, leaving the actual selection to the employer.¹ Most private employers use a version of the standard federal panel, which covers marijuana, cocaine, opioids, amphetamines, and PCP.³

Federally regulated industries face stricter rules. The Department of Health and Human Services updated its mandatory workplace drug testing guidelines effective July 2025, adding fentanyl and norfentanyl to the authorized panel for both urine and oral fluid specimens.⁴ DOT-regulated employers now screen for a broader range of opioids than a typical private-sector panel covers.

Federal guidelines also authorize oral fluid testing as an alternative to urinalysis, adopted in part to combat specimen tampering because oral fluid collection is directly observed by nature.⁵ Arizona’s statute does not restrict which specimen type an employer uses, so private employers can adopt oral fluid testing as well.

Marijuana: Where the Rules Get Complicated

Arizona voters legalized medical marijuana in 2010 and recreational adult use in 2020, but employers can still test for THC and act on positive results in most situations.⁶ The protections for applicants exist, but they are narrower than many assume.

Medical Marijuana Cardholders

ARS 36-2813(B) prohibits employers from discriminating against a registered qualifying patient based on cardholder status or a positive marijuana test. Two carve-outs limit that protection. An employer can still take action if the patient used, possessed, or was impaired by marijuana on the employer’s premises or during work hours. The employer can also act if failing to do so would cost it a monetary or licensing-related benefit under federal law.⁷

Practically, a cardholder who tests positive on a pre-employment screen but was not impaired at work generally cannot be rejected solely for that result, unless the employer is subject to federal requirements that prohibit marijuana use. Federal contractors and DOT-regulated employers almost always fall into that second exception.

Recreational Users

Proposition 207, the Smart and Safe Arizona Act, preserves employer rights explicitly. It does not restrict an employer’s ability to maintain a drug-free workplace, enforce policies restricting marijuana use, or prohibit marijuana on company property. Recreational users do not receive the testing protections that ARS 36-2813(B) gives medical cardholders. An employer that follows the Drug Testing of Employees Act’s procedural requirements can decline to hire someone who tests positive for THC even if that person used marijuana legally at home days earlier.

The distinction matters: medical cardholders have a specific anti-discrimination statute; recreational users do not.

Safety-Sensitive Positions

Arizona defines “safety-sensitive position” broadly as any job the employer designates as safety-sensitive or any job that includes tasks the employer reasonably believes could affect the health or safety of the employee or others.⁸ The definition is employer-driven, which gives businesses wide discretion. A warehouse worker on a forklift, a nurse administering medication, and a laborer working at height could all qualify.

ARS 23-493.06 grants employers specific immunity for excluding someone from a safety-sensitive role based on a good-faith belief that the person is currently using any drug, legal or not, if that drug could impair job performance. The statute allows the employer to rely on test results, prescription warning labels, physician statements, or reputable published information about the drug’s effects.² Even a medical marijuana cardholder applying for a safety-sensitive role faces a higher risk of adverse action, because the employer’s latitude is broader.

Federal regulations layer additional requirements on top of Arizona law for certain industries. The Omnibus Transportation Employee Testing Act requires drug and alcohol testing for safety-sensitive employees across agencies including the FAA, FMCSA, FRA, and FTA.⁹ The Nuclear Regulatory Commission imposes its own fitness-for-duty programs for employees at commercial nuclear facilities. Those federal mandates override state-level marijuana protections.

Confidentiality and the Right to Explain

Drug test results are confidential communications under Arizona law. ARS 23-493.09 prohibits employers from disclosing results except to a limited group: the tested individual, people the individual designates in writing, employer personnel assigned to evaluate results, and an arbitrator, mediator, court, or government agency authorized by law to receive them.¹⁰ Results cannot be used as evidence in any proceeding except one related to actions taken under the Drug Testing of Employees Act.

The statute also restricts what a sample can be tested for. A specimen collected under this article can only be screened for unlawful drugs or alcohol as defined in the Act, not for other medical conditions or substances.¹⁰ An employer that runs a broader medical screen on a drug-testing sample is violating the law.

The right to explain a positive result is one of the ten mandatory policy elements under ARS 23-493.04, and it matters most when a positive result stems from a legitimate prescription. An applicant taking a prescribed opioid after surgery, or a benzodiazepine for anxiety, should have the chance to present documentation before the employer makes a final decision. Skipping this step is one of the faster ways for an employer to lose its statutory immunity. Under federal law, a drug test for illegal substances is not a medical examination under the Americans with Disabilities Act, but asking an applicant to list current prescriptions is a disability-related inquiry, which the ADA prohibits at the pre-offer stage.¹¹ The right-to-explain step is where prescription information belongs, not the application.

When Employers Lose Their Immunity

The incentive structure in the statute is blunt. Follow the rules and the employer is largely shielded from lawsuits; cut corners and that shield disappears. ARS 23-493.06 blocks causes of action against any employer that has established a compliant policy and testing program for a range of decisions, including actions based in good faith on positive test results, the decision not to test for a particular substance, failure to detect a specific drug, and suspending or terminating the testing program.²

Immunity evaporates when the employer fails to comply. Common failures that open the door to litigation include:

Testing some applicants for a position but not others, which invites discrimination claims.
Sharing results with managers or coworkers who have no role in the hiring decision.
Withdrawing an offer based on a positive result without giving the applicant a chance to present a prescription or medical explanation.
Rejecting a medical marijuana cardholder solely for a positive THC test when no impairment, workplace use, or federal-funding conflict exists.⁷

Employers in federally regulated industries face an added layer of risk. A trucking company or pipeline operator that fails to comply with DOT testing standards can face penalties from the relevant federal agency on top of any state-law exposure. For most Arizona employers, the practical consequence of noncompliance is losing the good-faith immunity that makes the testing program legally defensible in the first place. For applicants, that same immunity gap is what makes a claim worth pursuing when an offer is withdrawn after a botched process.

1
Arizona Legislature. Arizona Revised Statutes 23-493.04 – Testing Policy Requirements
2
Arizona Legislature. Arizona Revised Statutes 23-493.06 – Employer Protection From Litigation
3
U.S. Department of Transportation. What Substances Are Tested
4
Federal Register. Mandatory Guidelines for Federal Workplace Drug Testing Programs – Authorized Testing Panels
5
Federal Register. Procedures for Transportation Workplace Drug and Alcohol Testing Programs – Addition of Fentanyl
6
Arizona Judicial Branch. Timeline of Marijuana-Related Initiatives in Arizona
7
Arizona Legislature. Arizona Revised Statutes 36-2813 – Discrimination Prohibited
8
Arizona Legislature. Arizona Revised Statutes 23-493 – Definitions
9
SAMHSA. Considerations for Safety and Security-Sensitive Industries
10
Arizona Legislature. Arizona Revised Statutes 23-493.09 – Confidentiality of Results, Access to Records
11
U.S. Equal Employment Opportunity Commission. Enforcement Guidance on Disability-Related Inquiries and Medical Examinations of Employees Under the ADA