Occupational Exposure and Health Symptoms Related to the Tijuana River Valley Sewage Crisis – Results from an Assessment of Chemical Exposures, California, 2024

OBJECTIVE: Describe health outcomes among workers affected by the Tijuana River Valley (TRV) sewage crisis. METHODS: In October-November 2024, a cross-sectional online survey was administered to individuals who worked in areas affected by the TRV sewage crisis as part of an Assessment of Chemical Exposures. RESULTS: Among 443 workers, 110 (25%) reported direct contact with contaminated Tijuana River or beach water. 55% of workers reported exposure to severe odor. Nearly two-thirds experienced physical symptoms attributed to the crisis, and one-third missed work due to symptoms. Direct water contact was linked to higher prevalence of physical and mental health symptoms and absenteeism. Those reporting work-related direct water contact were largely outdoor workers. CONCLUSIONS: TRV workers have experienced health impacts due to the ongoing sewage crisis. Findings may help inform public health response and resource needs.