Drug Testing Laws in Virginia

State law (Virginia): The protection is precise about its trigger: an employer may not discharge, discipline or discriminate against an employee for the employee's lawful use of cannabis oil, where the employee has a valid written certification issued by a practitioner for the treatment or to eliminate the symptoms of a diagnosed condition or disease Source 1State legislatureVa. Code §40.1-27.4 — discrimination against employee for lawful cannabis oil use prohibited — checked 18 Aug 2026.

State law (Virginia): It doesn't disarm the employer on conduct. The section expressly preserves action against work impairment caused by cannabis oil use, and the ability to prohibit possession during work hours Source 1State legislatureVa. Code §40.1-27.4 — discrimination against employee for lawful cannabis oil use prohibited — checked 18 Aug 2026.

Employer policy: Outside that certified-use scenario, this section doesn't regulate drug testing in Virginia at all. It says nothing about panels, cutoffs, confirmation, laboratories or notice, and we haven't identified a Virginia statute that does. That is an absence in our research, not a statute declaring there are no such rules.

State law (Virginia): The protective language is framed around an employee: discharge, discipline, discrimination. Only the defense industrial base exception speaks of applicants as well as employees Source 1State legislatureVa. Code §40.1-27.4 — discrimination against employee for lawful cannabis oil use prohibited — checked 18 Aug 2026. The wording matters here, so read it closely.

We're therefore not asserting that this section protects you at the hiring stage. If that question matters to your situation, put it to a Virginia employment lawyer instead of settling it from this page.

State law (Virginia): The certification is the whole basis of the protection. It must be a valid written certification issued by a practitioner, authorizing cannabis oil for the treatment or elimination of symptoms of the employee's diagnosed condition or disease Source 1State legislatureVa. Code §40.1-27.4 — discrimination against employee for lawful cannabis oil use prohibited — checked 18 Aug 2026. No certification, no protection under this section.

Employer policy: If you rely on this, get the certification in order before a test happens, not after a result lands. The protection attaches to lawful certified use, and the document is the evidence of it.

State law (Virginia): Two carve-outs, and the second is unusual enough to be worth memorizing. Law-enforcement officers are expressly excluded from the section's protections Source 1State legislatureVa. Code §40.1-27.4 — discrimination against employee for lawful cannabis oil use prohibited — checked 18 Aug 2026.

State law (Virginia): And a defense industrial base sector employer, as designated by the U.S. Cybersecurity and Infrastructure Security Agency, may reject an applicant or employee who tests positive for THC above 50 ng/mL for a urine test or 10 pg/mg for a hair test Source 1State legislatureVa. Code §40.1-27.4 — discrimination against employee for lawful cannabis oil use prohibited — checked 18 Aug 2026.

That's rare: a state statute naming its own numeric cutoffs, and doing it for hair as well as urine, despite hair having never been authorized for federal workplace testing. If you work in Virginia's defense sector, those two figures decide your position, and they aren't the federal ones.

State law (Virginia): The federal escape hatch is broad. An employer need not comply where doing so would put it in violation of federal law, or would result in the loss of a federal contract or federal funding Source 1State legislatureVa. Code §40.1-27.4 — discrimination against employee for lawful cannabis oil use prohibited — checked 18 Aug 2026.

Federal (DOT): A DOT-regulated test is governed entirely by the federal rulebook, and a practitioner's certification isn't a legitimate medical explanation for a federal marijuana positive. Virginia's protection doesn't cross into that program.

Employer policy: Given how much federal contracting sits in Northern Virginia, the federal-funding exception isn't a technicality. For a large share of Virginia employers it may be the operative clause, not the protection.