MAASSLUIS, Netherlands – Several homes were evacuated in Maassluis, Netherlands, on Monday evening, March 23, 2026, after residents reported a strange, gasoline-like odor. The incident prompted a response from emergency services and an investigation into the source of the smell, which initially raised concerns about public safety.
According to reports, the unusual scent was first detected on Asserdreef. Authorities responded to multiple complaints and, as a precaution, began evacuating nearby residences. The fire department ventilated the affected homes and worked to pinpoint the origin of the odor.
The source of the smell was eventually traced to the sewer system, officials confirmed. Riooldampen (sewer fumes) had entered homes through crawl spaces, causing discomfort to residents. The fumes were described by some as having a gasoline-like smell, leading to the initial alarm.
Several residents reported experiencing headaches and other physical discomfort. Paramedics examined those affected at the scene. After measurements confirmed that air quality had returned to safe levels, residents were allowed to return to their homes Monday night.
The municipality of Maassluis announced that the sewer system will undergo further inspection and cleaning on Tuesday, March 24, 2026. While the situation is no longer considered dangerous, residents may experience lingering odor nuisance throughout the night and morning.
Residents experiencing lingering smells are advised to close doors and windows and turn off ventilation systems. They are encouraged to check the DCMR website or call 0888-333 555 for updates and to report any additional concerns. Individuals experiencing symptoms such as stinging eyes or difficulty breathing are advised to call 112. Information is also available on the Rijnmondveilig app and website. This incident underscores the potential health risks associated with compromised sewer infrastructure.
The emergency response was initially scaled to GRIP 1, a protocol used to enhance coordination among various emergency services. The fire department conducted extensive checks and measurements in three homes to assess the concentration of the fumes.
