Alcohol and drug testing in the workplace: is it safe?
Under the Dutch Working Conditions Act, employers are obliged to provide a safe working environment. In this context, employers sometimes implement a strict alcohol and drugs policy. But how far can that go? Can an employer test an employee for alcohol or drug use? The Limburg District Court recently ruled on this issue. What can employers do in this regard?
Ruling Limburg District Court – 20 February 2025
The case concerned SIF Netherlands B.V., a manufacturer of foundations for offshore wind farms, which had introduced a zero-tolerance policy regarding alcohol and drug use. One of its employees, employed since 2008 and responsible for quality inspections, tested positive for cannabis during an unannounced saliva test on 25 September 2024. Several colleagues also reported red eyes and strange behaviour. While the employee admitted to having used cannabis the previous evening, he denied being under the influence while at work. Nevertheless, SIF sought permission to terminate the employment contract on the basis of serious culpable conduct (ground e), a disrupted employment relationship (ground g), or a combination of grounds (ground i).
The court rejected the request for termination. Although the question of drug use was considered legitimate, the court ruled that the test did not establish that the employee had been under the influence during work hours. Moreover, the test had been conducted unlawfully, breaching the employee’s right to a private life and privacy. As a result, the test results were excluded. Moreover, the witness statements from colleagues were deemed insufficiently substantiated to justify termination.
The Legal Landscape
Employers have a legal duty to ensure a safe working environment. The question is under which circumstances they may take a specific measure to test for drugs and/or alcohol. There is ample case law involving employees appearing at work under the influence of drugs or alcohol, where disciplinary actions were upheld. Yet, this employer’s request for termination was not upheld. Why is that?
Employment Law Consequences
If an employer suspects an employee of being under the influence in a way deemed unacceptable, disciplinary measures may be taken. Although Dutch law does not list exhaustive employment-related sanctions, potential measures include a formal warning, suspension, wage withholding, a fine, or even dismissal (including summary dismissal).
The challenge of evidence
Any sanction must be justified and proportionate to the alleged misconduct. The employer bears the burden of proving both the conduct and the proportionality of the measure. Courts also assess whether the evidence was lawfully obtained. Unlawfully obtained evidence may be excluded. In the context of alcohol or drug testing, courts will weigh the interest in truth-finding against the employee’s right to a private life and privacy.
The Right to private life
The right to a private life, protected under Article 8 of the European Convention on Human Rights (ECHR), shields employees from unwarranted intrusions. Alcohol and drug testing constitutes an infringement of this right. Such an infringement is only permitted under strict conditions. The court will assess whether the infringement serves a legitimate goal and is suitable to achieve that goal (necessity criteria), whether the infringement is proportionate (proportionality criteria) and whether there is a less intrusive alternative (subsidiarity criteria).
GDPR considerations
When an employer processes personal data of a employee, the General Data Protection Regulation (GDPR) applies. The results of alcohol and/or drug testing constitute a special category of data. Processing of such data is in principle prohibited, unless one of the exceptions under the GDPR applies. According to the Dutch Data Protection Authority (AutoriteitvPersoonsgegevens or ‘AP’), processing such data requires a specific legal basis. Currently, such a basis exists only for certain sectors (e.g. aviation and maritime and public transport).
Practical recommendations for employers
Testing for alcohol or drugs in the workplace is legally complex. Employers should verify whether their sector has a statutory basis allowing testing. Its advisable to consider adopting a written zero-tolerance policy outlining potential disciplinary measures in the case of a breach, including (immediate) dismissal.
If you suspect an employee is under the influence during working hours, take them aside privately with a witness present. Ask the employee directly whether alcohol or drug use is involved and stress that this is a safety matter.
If you are reasonably convinced that substance use is at play, suspend the employee and send them home. Document the incident and the meeting as thoroughly as possible and confirm your findings to the employee in writing, inviting a response. The appropriate sanction will depend on the specific circumstances. Seek legal advice as soon as possible before initiating further steps.
Contact
Would you like to introduce or update your alcohol and/or drugs policy? Do you suspect an employee has appeared at work under the influence? Do you have another related question? Please do not hesitate to contact Gerard Zuidgeest, Rose Hortsman or one of our other employment law specialists. We would be happy to assist.
22 April 2025