On Wednesday, the Environmental Protection Agency announced plans to weaken limits on some harmful “forever chemicals” in drinking water roughly a year after the Biden administration finalized the first-ever national standards.
The Biden administration said last year the rules could reduce PFAS exposure for millions of people. It was part of a broader push by officials then to address drinking water quality by writing rules to require the removal of toxic lead pipes and, after years of activist concern, address the threat of forever chemicals.
President Donald Trump has sought fewer environmental rules and more oil and gas development. EPA Administrator Lee Zeldin has carried out that agenda by announcing massive regulatory rollbacks.
Now, we know the EPA plans to rescind limits for certain PFAS and lengthen deadlines for two of the most common types. Here are some of the essential things to know about PFAS chemicals and what the EPA decided to do:
PFAS, or perfluoroalkyl and polyfluoroalkyl substances, are a group of chemicals that have been around for decades and have now spread into the nation’s air, water and soil.
They were manufactured by companies such as 3M, Chemours and others because they were incredibly useful. They helped eggs slide across nonstick frying pans, ensured that firefighting foam suffocates flames and helped clothes withstand the rain and keep people dry.
The chemicals resist breaking down, however, which means they stay around in the environment.
Environmental activists say that PFAS manufacturers knew about the health harms of PFAS long before they were made public. The same attributes that make the chemicals so valuable – resistance to breakdown – make them hazardous to people.
PFAS accumulates in the body, which is why the Biden administration set limits for two common types, often called PFOA and PFOS, at 4 parts per trillion that are phased out of manufacturing but still present in the environment.
There is a wide range of health harms now associated with exposure to certain PFAS. Cases of kidney disease, low-birth weight and high cholesterol in addition to certain cancers can be prevented by removing PFAS from water, according to the EPA.
The guidance on PFOA and PFOS has changed dramatically in recent years as scientific understanding has advanced. The EPA in 2016, for example, said the combined amount of the two substances should not exceed 70 parts per trillion. The Biden administration later said no amount is safe.
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