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

Delaware has no general statute regulating how private employers drug test, so a pre-employment test is lawful under the employer's own written policy. The limit that matters is medical marijuana: 16 Del. C. § 4905A bars refusing to hire a registered patient because of a positive marijuana test, unless the patient used, possessed or was impaired by marijuana at work or during working hours, or the employer would lose a federal monetary or licensing benefit. Adult-use cannabis is legal for people 21 and older, but the Delaware Marijuana Control Act leaves employment policies and discipline to the employer, as of October 2026.

Delaware drug testing rules at a glance

Does Delaware have a drug testing law for employers?

Not a general one. Unlike Minnesota or Vermont, Delaware sets no notice form, laboratory standard or confirmation step for private-employer drug tests: we found no drug-testing procedure in Title 19 of the Delaware Code, which holds the state's employment laws. That leaves a private employer's applicant test governed by:

• its own written policy, which should name the panel, when testing happens and how results are reviewed;
• the medical marijuana protections in Title 16, chapter 49A, described below;
• Delaware's disability law. Under 19 Del. C. § 722, a "person with a disability" does not include someone who is an alcoholic or drug abuser whose current use prevents them from doing the job or would be a direct threat to property or others' safety; and
• federal rules where they apply, such as DOT testing for commercial drivers.

Because no state statute standardizes the process, follow the federal model in practice: test after a conditional offer, use a federally certified laboratory, confirm every positive, and route results through a medical review officer who can confirm a lawful prescription without passing medical details to the hiring team.

Can Delaware employers test applicants for marijuana?

Yes, but what you may do with a positive result depends on whether the applicant is a registered medical patient.

Registered medical marijuana patients

The Delaware Medical Marijuana Act, at 16 Del. C. § 4905A(a)(3), says that unless failing to do so "would cause the employer to lose a monetary or licensing-related benefit under federal law or federal regulations," an employer may not discriminate in hiring, termination or any term or condition of employment, or otherwise penalize a person, based on:

1. the person's status as a cardholder; or
2. "a registered qualifying patient's positive drug test for marijuana components or metabolites, unless the patient used, possessed, or was impaired by marijuana on the premises of the place of employment or during the hours of employment."

Section 4907A adds two employer-side rules. An employer does not have to allow anyone to ingest marijuana in the workplace or work under its influence, and may discipline an employee who does (§ 4907A(a)(3), (b)). But "a registered qualifying patient shall not be considered to be under the influence of marijuana solely because of the presence of metabolites or components of marijuana." In practice, a THC-positive pre-employment test from a registered patient, with nothing else, is not a lawful reason to withdraw an offer, unless the federal-benefit exception applies. Section 4905A(c) also says no employer may be penalized or denied any state benefit for employing a cardholder.

The Office of the Marijuana Commissioner runs the Medical Marijuana Program; its FAQ says House Bill 425, passed in 2024, moved the program there from the Division of Public Health.

Adult-use cannabis

The Delaware Marijuana Control Act, Title 4, chapter 13, became effective July 5, 2023, according to the Office of the Marijuana Commissioner, and the state announced that adult-use sales began on August 1, 2025. The OMC FAQ says people 21 or older may possess up to the personal use quantity, one ounce or less of leaf marijuana. None of that protects job applicants: 4 Del. C. § 1304, headed "Places of employment," says the chapter is not "intended to impact or impose any requirement or restriction on employers with respect to terms and conditions of employment including accommodation, policies, or discipline," and § 1307 lets an employer prohibit or regulate marijuana on property it owns or controls.

So a Delaware employer may keep THC on its pre-employment panel and act on a positive from an applicant who is not a registered patient. It needs a separate path for cardholders.

Handling a THC positive from a Delaware applicant

1. Let the MRO speak to the applicant first. The applicant can show a registry card to the medical review officer instead of explaining a medical condition to a recruiter.
2. Check the job against the federal exception. Is the role DOT-regulated, or would hiring a cardholder cost the employer a federal contract, grant or license? If not, the § 4905A protection applies.
3. Look for evidence beyond the test. Only use, possession or impairment on the premises or during working hours takes a registered patient outside the protection; a pre-employment metabolite result alone does not.
4. Write down the reason. Whatever you decide, record which statutory basis you relied on, in case the applicant later says the decision was based on cardholder status.

Which federal rules still apply in Delaware?

• DOT-regulated roles follow 49 CFR Part 40; a commercial driver needs a verified negative pre-employment result before the first safety-sensitive function (49 CFR 382.301).
• Rescheduling. The April 28, 2026 order moved FDA-approved and state-medical-license marijuana to Schedule III, but DOT's Part 40 guidance (May 15, 2026) says a Delaware medical marijuana card still cannot make a DOT positive negative.
• Federal contracts and licenses. The § 4905A exception turns on losing "a monetary or licensing-related benefit under federal law or federal regulations." Federal contractors also need the policy statement and awareness program in the FAR Drug-Free Workplace clause; document which federal requirement applies before relying on the exception.
• The ADA: see pre-employment medical exams under the ADA.

What should staffing agencies placing workers in Delaware do?

1. Ask about cardholder status the right way. Do not ask candidates about cannabis use in interviews; let the medical review officer handle a positive and give the candidate a chance to show a registry card. See illegal interview questions.
2. Treat § 4905A as your own obligation. If the agency is the employer, it cannot drop a registered patient from an assignment over a THC result alone because a client prefers a zero-tolerance panel.
3. Record the federal exception. For a client with federal contracts or licenses, write down which federal benefit is at stake before relying on it.
4. Separate impairment evidence from the test. Document observed use or impairment at work, the only non-federal basis § 4905A recognizes.

Delaware no longer licenses employment agencies; see Delaware staffing agency rules. For the rest of the hiring process, see the Delaware hiring checklist, Delaware ban-the-box rules, Delaware's salary history ban, Delaware pay transparency, E-Verify in Delaware and Delaware's recording consent law.

Checklist: before you drug test an applicant in Delaware

1. Write a testing policy: panel, timing after a conditional offer, laboratory, MRO review and confidentiality.
2. Identify DOT-regulated and federally funded or licensed roles, and test them under the federal rules.
3. For other roles, decide how you will handle a THC positive from a registered patient before it happens.
4. Keep any adverse decision based on observed use or impairment at work, not metabolites alone.
5. Use the drug testing policy template and compare other states in drug testing laws in hiring.