The Toxic Footprint of California Wildfires: A Review of Inorganic and Organic Contaminants in Post-Fire Environments

The frequency and severity of wildfires in California have increased substantially in recent decades, largely driven by climate change and prolonged drought conditions. Beyond immediate ecological destruction, wildfires release a complex mixture of inorganic and organic contaminants into surrounding air, soil, and water systems, posing long-term environmental and public health risks. This literature review addresses the gap in wildfire research by examining the post-wildfire impacts of several hazardous contaminants, including volatile organic compounds, polycyclic aromatic hydrocarbons, hexavalent chromium, and asbestos. The findings demonstrate that these contaminants contribute to ecological disturbances such as reproductive abnormalities in aquatic organisms, bioaccumulation within food webs, disruption of soil microbiomes, and genotoxic effects in vegetation. In addition, exposure to wildfire-associated pollutants has been linked to adverse human health outcomes, including respiratory disease, increased asthma incidence, and elevated cancer risk. Collectively, the findings highlight the persistent and multifaceted consequences of wildfire pollution and emphasize the need for improved wildfire prevention strategies, environmental remediation efforts, and public health protections in vulnerable communities.