As wildfires rage across Los Angeles, multiple utility companies have issued warnings that drinking water may be unsafe until comprehensive testing can verify its safety.
The intensification of wildfires, fueled by a warmer and drier climate, poses a significant risk, particularly as toxic chemicals from fires can infiltrate damaged drinking water systems. Experts caution that methods like filtering or boiling may not eliminate these contaminants.
Recently, Pasadena Water and Power issued a “Do Not Drink” alert to nearly a third of its customers—an unprecedented move in over a century of service—due to concerns of toxic chemical infiltration from damaged infrastructure.
Utility officials took this precautionary step following significant infrastructure damage, including burnt pumps and storage tanks, where experts emphasized the potential for hazardous substances to enter water systems.
After conducting testing, the utility lifted the drinking water advisory for most areas this week, alleviating concerns. However, as fire incidents impact urban environments, the risk of infrastructure damage escalates. Andrew Whelton, a water contamination researcher, noted the dangers of ash, smoke, and debris potentially entering compromised water systems.
The burning of chemically treated building materials can release harmful substances, posing serious health risks even at low concentrations. Drinking water systems, designed to be airtight, can lose critical pressure during fires, which allows toxins to infiltrate the systems.
In addition to damage from wildfires, the demand for water from firefighting efforts leads to further strain on the already compromised systems. Reports indicate instances, particularly in fire-ravaged neighborhoods, where hydrants ran dry due to overwhelming demand, raising alarms at the state level.
Experts assert that exposure to toxic chemicals in contaminated water can lead to a range of health problems, from short-term illness to more serious chronic conditions, including cancer. A notable incident from past wildfires revealed alarming benzene levels that raised public health concerns. Even minimal exposure over time can increase cancer risk, highlighting the need for vigilance in communities recovering from fire-related damage.
Los Angeles County, housing over 200 water service providers, is now navigating the aftermath of these disasters, with only a few placing “Do Not Drink” advisories amid ongoing investigations into water contamination. Most utilities prioritize ensuring sufficient water supply for firefighting while initiating contaminant testing, a process that may take weeks to establish water safety in less damaged areas.
Reflecting on the challenges from previous wildfires, efforts to restore safe drinking water may span years, necessitating significant investments in infrastructure.
While experts recommend against private water testing until utilities confirm water safety, they urge residents to adhere to guidelines from local officials regarding water safety precautions, as many standard tests may not adequately detect fire-related contaminants. Until public water systems are verified safe, following utility advice remains crucial for community health.
