When the Smoke Clears: Safeguarding Water Quality After Wildfires

Wildfires are devastating events that leave visible scars on landscapes and communities. However, one of the less visible yet critical consequences is the impact on water quality. As flames subside, the integrity of water systems often comes into question, posing risks that demand immediate attention.

The Hidden Aftermath: How Wildfires Compromise Water Systems

Wildfires can significantly alter the quality of source water. Ash and debris can increase the alkalinity and pH levels of streams and lakes, while runoff may introduce contaminants like metals and organic matter. This organic matter elevates Total Organic Carbon (TOC) levels, leading to higher chlorine demand and potentially increasing disinfection byproducts in chlorinated water sources.

Moreover, the intense heat from wildfires can damage infrastructure. Plastic pipes may undergo thermal degradation, releasing harmful chemicals into the water supply. In some cases, compromised pipes can create negative pressure, drawing soot, ash, and chemicals back into the distribution system, resulting in elevated levels of volatile organic compounds (VOCs) in drinking water.

Testing and Treatment: Ensuring Safe Water Post-Disaster

In the aftermath of a wildfire, it’s crucial to assess water quality before resuming normal usage. Testing for VOCs is essential, as these compounds can be highly localized within the distribution system. Certified drinking water laboratories can perform these tests, and resources are available through the EPA’s website to locate such facilities.

Once contamination levels are identified, appropriate treatment measures can be implemented. This may include replacing point-of-use (POU) cartridges, regenerating or backflushing point-of-entry (POE) systems, and disinfecting equipment to address microbial contamination. Following manufacturer guidelines for sanitizing water treatment systems is recommended, and additional guidance is available through the Water Quality Association (WQA) resources.

Community Resilience: The Role of Water Professionals in Recovery

Water treatment professionals play a pivotal role in community recovery efforts post-wildfire. By providing accurate information, conducting thorough testing, and implementing effective treatment solutions, they help restore confidence in the safety of the water supply. Educating the public on potential risks and the importance of water quality testing is also a key component of this process.

The WQA offers a range of resources to support professionals in these efforts, including guidance documents and consumer handouts that address common concerns related to water quality after wildfires.

Note: This article is based on information provided by the Water Quality Association. For more detailed guidance and resources, please visit their Wildfires Resources for Water Treatment Professionals page.