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Delving into the Origins of ‘Forever Chemicals’ Tainting Drinking Water

Delving into the Origins of 'Forever Chemicals
The foam used to fight fires involving flammable liquids, such as on aircraft, often contain PFAS wh... The foam used to fight fires involving flammable liquids, such as on aircraft, often contain PFAS which can then get into the wider environment
Delving into the Origins of 'Forever Chemicals
The foam used to fight fires involving flammable liquids, such as on aircraft, often contain PFAS wh... The foam used to fight fires involving flammable liquids, such as on aircraft, often contain PFAS which can then get into the wider environment

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Delving into the Origins of ‘Forever Chemicals’ Tainting Drinking Water

The United States is implementing new environmental protections to limit the presence of long-lived PFAS chemicals in tap water, marking the first-ever national restrictions on these substances. PFAS, or per- and polyfluoroalkyl substances, are pervasive in various environments, including water, food packaging, cookware, bedding, clothing, and even within human bodies. These “forever chemicals” pose potential health risks and can accumulate over time.

The Environmental Protection Agency (EPA) is imposing restrictions on five individual PFAS compounds, including PFOA, PFOS, PFNA, PFHxS, and HFPO-DA (GenX Chemicals), as well as limits on mixtures of these compounds. The goal is to prevent thousands of deaths and reduce tens of thousands of illnesses over time. Additionally, the European Commission is preparing to ban certain PFAS compounds found in fire-fighting foams.

While some companies have begun phasing out certain PFAS chemicals, such as PFOS and PFOA, which are known to be hazardous to the immune system and linked to negative health effects, there are still over 9,000 PFAS compounds in use, each with various applications.

PFAS chemicals are notorious for their persistence, meaning they can remain in the environment and accumulate within living organisms for extended periods. The duration of their persistence depends on factors like molecular structure. Long-chain PFAS compounds tend to persist longer in the body compared to short-chain ones. Studies have shown that PFAS chemicals can linger in the body for years, with some compounds having half-lives of several years to decades.

Common sources of PFAS contamination include fire-fighting foams, waterproof clothing, food packaging, carpets, and plastic products. Exposure to PFAS can occur through ingestion, inhalation of contaminated dust, and absorption through the skin. Sewage sludge has also been identified as a source of PFAS contamination in cropland, leading to concerns about food chain contamination.

Overall, the introduction of environmental regulations targeting PFAS chemicals is a significant step in addressing their widespread presence and potential health risks. However, continued efforts are needed to mitigate their impact on human health and the environment.

 


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