{"id":39476,"date":"2020-08-03T16:40:00","date_gmt":"2020-08-03T13:40:00","guid":{"rendered":"https:\/\/en.buradabiliyorum.com\/wildfires-can-poison-drinking-water-heres-how-communities-can-be-better-prepared\/"},"modified":"2020-08-03T16:40:00","modified_gmt":"2020-08-03T13:40:00","slug":"wildfires-can-poison-drinking-water-heres-how-communities-can-be-better-prepared","status":"publish","type":"post","link":"https:\/\/buradabiliyorum.com\/en\/wildfires-can-poison-drinking-water-heres-how-communities-can-be-better-prepared\/","title":{"rendered":"#Wildfires can poison drinking water: Here’s how communities can be better prepared"},"content":{"rendered":"

“#Wildfires can poison drinking water: Here’s how communities can be better prepared<\/strong>”<\/p>\n

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\"Wildfires<\/img>
\n Survivors left everything to flee the Camp Fire\u2019s path. Credit: Andrew Whelton, Purdue University
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In recent years wildfires have entered urban areas, causing breathtaking destruction.<\/p>\n

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The 2018 Camp Fire in Paradise and Butte County, California was the deadliest and most destructive fire in California’s history. It took 86 lives and destroyed more than 18,000 structures in a matter of hours. <\/p>\n

Almost two years later, only a fraction of the area’s 40,000-plus population has returned. This disaster followed the 2017 Tubbs Fire, which killed 22 people in California’s Sonoma and Napa counties.
\nAfter both fires, drinking water tests revealed a plethora of acutely toxic and carcinogenic pollutants. Water inside homes was not safe to use, or even to treat. Water pipes buried underground and inside of buildings were extensively contaminated.
\nWe are environmental engineers who help communities affected by disasters, and supported responses to both fires. As we conclude in a recently published study of burned areas, communities need to upgrade building codes to keep wildfires from causing this kind of widespread contamination of drinking water systems.
\nWildfires and water<\/b>
\nBoth the Tubbs and Camp fires destroyed fire hydrants, water pipes and meter boxes. Water leaks and ruptured hydrants were common. The Camp Fire inferno spread at a speed of one football field per second, chasing everyone\u2014including water system operators\u2014out of town.
\nAfter the fires passed, testing ultimately revealed widespread hazardous drinking water contamination. Evidence suggests that the toxic chemicals originated from a combination of burning vegetation, structures and plastic materials. <\/p>\n

Firefighting can accelerate the spread of contamination. As emergency workers draw hydrant water, they spread contaminated water through the water pipe network. <\/p>\n

Metal, concrete and plastic pipes can become contaminated. Many plastics take up these chemicals like sponges. As clean water later passes through the pipes, the toxic substances leach out, rendering the water unsafe.
\nIn the Tubbs and Camp fires, chemicals in the air may have also been sucked into hydrants as water pipes lost pressure. Some water system plastics decomposed and leached chemicals directly into water. Toxic chemicals then spread throughout pipe networks and into buildings.
\nLimited water testing by state and local agencies showed benzene and naphthalene were present at levels that could cause immedia<\/a>te harm. These, as well as methylene chloride, styrene, toluene and vinyl chloride exceeded longer-term regulated exposure limits. Many of these chemicals cause cancer. All can cause vomiting, diarrhea and nausea after short-term high concentration exposure.
\nAnyone who drinks the water containing these substances could be harmed. And simply running a faucet could cause chemicals to enter the air. Hot showers and boiling water would vaporize the chemicals and increase the dose a person breathed in. Some of these substances can also be absorbed through the skin.
\nDangerous contamination levels<\/b>
\nBenzene was found at concentrations of 40,000 parts per billion (ppb) in drinking water after the Tubbs Fire and at more than 2,217 ppb after the Camp Fire. According to the California Office of Environmental Health Hazard Assessment, children exposed to benzene for a single day can suffer harm at levels as low as 26 ppb.
\nThe U.S. Environmental Protection Agency recommends limiting children’s short-term acute exposure to 200 ppb, and long-term exposure to less than 5 ppb. The EPA regulatory level for what constitutes a hazardous waste is 500 ppb. <\/p>\n

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\"Wildfires<\/img>
\n Plastic pipes can be damaged by heat and fire contact. Credit: Andrew Whelton, Purdue University
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In early 2019, California conducted contaminated water testing on humans by taking contaminated water from the Paradise Irrigation District and asking persons to smell it. The state found that even when people smelled contaminated water that had less than 200 ppb benzene, at least one person reported nausea and throat irritation. The test also showed that water contained a variety of other benzene-like compounds that first responders had not sampled for.
\nThe officials who carried out this small-scale test did not app<\/a>ear to realize the significance of what they had done, until we asked whether they had had their action approved in advance by an institutional review board. In response, they asserted that such a review was not needed.
\nIn our view, this episode is telling for two reasons. First, one subject reported an adverse health effect after being exposed to water that contained benzene at a level below the EPA’s recommended one-day limit for children. Second, doing this kind of test without proper oversight suggests that officials greatly underestimated the potential for serious contamination of local water supplies and public harm. After the Camp Fire, together with the EPA, we estimated that some plastic pipes needed more than 280 days of flushing to make them safe again.
\nBuilding codes could make areas disaster-ready<\/b>
\nOur research underscores that community building codes are inadequate to prevent wildfire-caused pollution of drinking water and homes.
\nInstalling one-way valves, called backflow prevention devices, at each water meter can prevent contamination rushing out of the damaged building from flowing into the larger buried pipe network.
\nAdopting codes that required builders to install fire-resistant meter boxes and place them farther from vegetation would help prevent infrastructure from burning so readily in wildfires. Concrete meter boxes and water meters with minimal plastic components would be less likely to ignite. Some plastics may be practically impossible to make safe again, since all types are susceptible to fire and heat.
\nWater main shutoff valves and water sampling taps should exist at every water meter box. Sample taps can help responders quickly determine water safety. <\/p>\n

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