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

Iowa allows private employers to drug test job applicants, but only under the procedures in Iowa Code section 730.5, the private sector drug-free workplaces law. As of October 2026, the employer must test within a written policy that applicants can review, pay all costs, give the applicant a list of the drugs tested for, confirm any positive screen at a federally certified laboratory, have a medical review officer review it, and tell the applicant about a confirmed positive in writing. Iowa does not protect medical cannabis patients from that result, and hair testing is allowed for applicants only.

Does Iowa have a drug testing law for private employers?

Yes. Iowa Code section 730.5 sets the rules for any private employer that chooses to test. It does not require testing, and an employer may test at some work sites and not others (section 730.5(3)). Key definitions:

• Employer includes a person, company, labor organization or employment agency with one or more full-time employees in Iowa. The state, cities, counties, school districts and the federal government are excluded.
• Prospective employee means anyone who has applied, in writing or orally, to become an employee. There is no requirement to make a conditional offer before testing an applicant.
• Federally required testing is outside the section (section 730.5(2)), so DOT-covered drivers follow federal rules.

An employer that sets up a program in line with the section gets broad protection: section 730.5(11) bars causes of action for good-faith testing, for acting on a confirmed positive, and for failing to test. An employer that violates the section can be ordered to hire or reinstate the person, with or without back pay, plus attorney fees (section 730.5(15)).

What are Iowa's rules for pre-employment drug tests?

Section 730.5(8)(d) allows testing of prospective employees, and section 730.5(8)(g) allows hair testing of prospective employees only. The procedure:

1. Write the policy first. Testing must be carried out within a written policy provided to every employee subject to testing and available for review by prospective employees. If the applicant is a minor, a copy goes to a parent, with a receipt (section 730.5(9)(a)). Instead of certified mail, the employer may offer in-person delivery or electronic notice if the person chooses it.
2. Set uniform consequences. The policy must state the same disciplinary or rehabilitative actions for everyone who tests positive or refuses, and any action must be based only on the test result (section 730.5(9)(b)).
3. Pay for it. The employer pays all actual costs of testing it requires of employees and prospective employees (section 730.5(7)).
4. Collect with privacy. Urine and hair collection that requires removing clothing must be done in private unless there is reasonable suspicion of tampering, and any directly observed collection must be by someone of the same gender (section 730.5(7)(a)). Hair samples are limited to 1.5 inches closest to the skin (section 730.5(7)(e)).
5. Invite medication information. The applicant gets a chance to list prescription or nonprescription drugs and other medical information, and the employer must provide a list of the drugs tested for (section 730.5(7)(c)).
6. Confirm and review. Every initial positive is confirmed by a different chemical process, such as gas chromatography/mass spectrometry, at a laboratory certified by SAMHSA or approved under Iowa health department rules, and a medical review officer reviews the result before it is reported (section 730.5(7)(f) to (h)).
7. Notify in writing. For a confirmed positive, the employer tells the applicant in writing of the result, the medical review officer's name and address, and the right to request the testing records (section 730.5(7)(j)(2)). The applicant must request records within 15 calendar days of that notice (section 730.5(13)(b)).

A confirmed positive or a refusal may then be a basis for refusing to hire (section 730.5(10)(a)(4)). A confirmed positive alone does not make someone a person with a disability under Iowa law (section 730.5(9)(d)), but the federal ADA still governs how you handle prescription explanations. Test communications are confidential and may not be used in a criminal case against the person tested (section 730.5(13)).

Some protections in the section are written for current employees rather than applicants: the split sample and the right to a second confirmatory test at a lab of the employee's choice (section 730.5(7)(b) and (j)(1)), and paid work time for testing. Plan for those once the candidate is on payroll.

What does Iowa say about marijuana and hiring?

Iowa's patient program is the Medical Cannabidiol Act, Iowa Code chapter 124E, and it gives patients no shield against an employer's drug policy:

• Section 124E.21 says nothing in the chapter requires an employer to allow marijuana in the workplace, or stops an employer from restricting employees' use, writing a ban into an employment contract, or keeping a zero-tolerance or drug-free workplace policy under section 730.5.
• Section 124E.24 says the chapter creates no claim for discrimination, including for refusing to hire.
• Section 730.5(11)(f) gives an employer with a compliant program immunity for testing or acting against an applicant whose confirmed positive comes from authorized medical cannabidiol use.
• Outside the program, possessing marijuana remains a crime under Iowa Code section 124.401(5); Iowa has no adult-use law.

In practice, an Iowa employer may treat a THC-positive applicant like any other confirmed positive, provided the test followed section 730.5 and the policy says so.

Which federal rules still apply in Iowa?

• DOT-regulated roles follow 49 CFR Part 40 and the agency rule, such as the FMCSA's requirement in 49 CFR 382.301 for a verified negative pre-employment result before a driver's first safety-sensitive function. Section 730.5(2) leaves those tests to federal law, and the employer may keep federally tested staff out of its state random pools.
• Marijuana's partial rescheduling on April 28, 2026 covered FDA-approved products and state-medical-license marijuana; DOT's Part 40 guidance (May 15, 2026) says state-licensed marijuana still cannot turn a positive into a negative.
• Federal contractors need the policy statement and awareness program in the FAR Drug-Free Workplace clause, which does not itself require testing.
• The ADA. The EEOC says an employer may ask an applicant who tests positive about lawful medications to validate the result. See pre-employment medical exams under the ADA.

What should staffing agencies placing workers in Iowa do?

• The agency is an employer under section 730.5. If the agency tests its candidates, its own written policy must be available to them and the agency pays for the test.
• Client sites can differ. Because the section allows testing at some work sites and not others, an agency can run testing only for placements at clients that require it, as long as its policy says which sites are covered.
• Use hair tests only before hire. If a client asks for hair testing of workers already on assignment, section 730.5(8)(g) limits hair testing to prospective employees.
• Keep results confidential. Section 730.5(13) limits disclosure; build client reporting around pass or not-cleared status rather than lab detail, and check the section before sharing anything more.

Agency registration is a separate topic covered in Iowa staffing agency licensing.

Iowa drug testing laws at a glance

A checklist before you test a candidate in Iowa

1. Put the policy in writing, list who is tested and at which sites, and make it available to applicants.
2. Include the list of drugs tested for and a way to report medications before collection.
3. Choose the sample type; hair is allowed only before hire.
4. Use a SAMHSA-certified or state-approved confirmation lab and a medical review officer.
5. Send the written notice of a confirmed positive with the MRO's details and the records right.
6. Apply the same consequence to every applicant with a confirmed positive or refusal.

For the national picture, read drug testing laws in hiring; to draft the policy, start from the pre-employment drug testing policy template; and for registration, withholding and new-hire reporting, see hiring employees in Iowa. Nearby states take different approaches: Montana also lets employers test any applicant under a written program, while Oklahoma waits for a conditional offer.