Cookie Consent by Free Privacy Policy Generator ๐Ÿ“Œ Plastic Pipes Are Polluting Drinking Water Systems After Wildfires

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๐Ÿ“š Plastic Pipes Are Polluting Drinking Water Systems After Wildfires


๐Ÿ’ก Newskategorie: IT Security Nachrichten
๐Ÿ”— Quelle: science.slashdot.org

An anonymous reader quotes a report from The Conversation: When wildfires swept through the hills near Santa Cruz, California, in 2020, they released toxic chemicals into the water supplies of at least two communities. One sample found benzene, a carcinogen, at 40 times the state's drinking water standard. Our testing has now confirmed a source of these chemicals, and it's clear that wildfires aren't the only blazes that put drinking water systems at risk. In a new study, we heated plastic water pipes commonly used in buildings and water systems to test how they would respond to nearby fires. The results, released Dec. 14, show how easily wildfires could trigger widespread drinking water contamination. They also show the risks when only part of a building catches fire and the rest remains in use. In some of our tests, heat exposure caused more than 100 chemicals to leach from the damaged plastics. To determine if plastic pipes could be responsible for drinking water contamination after wildfires, we exposed commonly available plastic pipes to heat. The temperatures were similar to the heat from a wildfire that radiates toward buildings but isn't enough to cause the pipes to catch fire. We tested several popular plastic drinking water pipes, including high-density polyethylene (HDPE), crosslinked polyethylene (PEX), polyvinyl chloride (PVC) and chlorinated polyvinylchloride (CPVC). Benzene and other chemicals were generated inside the plastic pipes just by heating. After the plastics cooled, these chemicals then leached into the water. It happened at temperatures as low as 392 degrees Fahrenheit. Fires can exceed 1,400 degrees. While researchers previously discovered that plastics could release benzene and other chemicals into the air during heating, this new study shows heat-damaged plastics can directly leach dozens of toxic chemicals into water. What can be done about the contamination? The report says a community can stop water contamination if they can quickly isolate the damaged pipes. Rinsing heat-damaged pipes can also work, but some plastic pipes require more than 100 days of nonstop water rinsing to be safe to use. If that's the case, the pipes may need to be replaced instead. "Water companies can install network isolation valves and backflow prevention devices, to prevent contaminated water moving from a damaged building into the utility pipe network," the report adds. "Insurance companies can use pricing to encourage property owners and cities to install fire-resistant metal pipes instead of plastic. Rules for keeping vegetation away from meter boxes and buildings can also lessen the chance heat reaches plastic water system components."

Read more of this story at Slashdot.

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