These ‘forever’ chemicals have been found in everything from pans to makeup to orange juice

Pennsylvania has officially set new limits on two forms of per- and poly-fluoroalkyl substances (PFAS) in Pennsylvania drinking water. The new rule sets maximum contaminant levels (MCLs) of the chemicals to prevent adverse health effects.

The rule sets an MCL of 14 parts per trillion (ppt) for PFOA and an MCL of 18 ppt for PFOS. 

PFAS are synthetic chemicals that create water-, heat-, and stain-resistant elements in products including cookware, carpets, clothing, furniture fabrics, paper packaging for food, and other resistant materials. The chemicals can be found in air, soil, and water; and have been used in products since the 1940s, including recent announcements of high levels in Simply Orange and Thinx period underwear.

PFOS and PFOA may cause liver damage, elevated cholesterol, changes in thyroid hormone levels, and reduced immune response.

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Julie Hancher is the co-founder and Executive Director of Green Philly, an independent media organization making sustainability accessible, affordable and actionable. Since launching Green Philly in 2008, she has grown it from a passion project into a leading voice for local climate storytelling, pairing impactful journalism with community events and experiences. Julie is a frequent speaker on climate, media innovation and the future of local journalism, and is the creator of SustainPHL and EcoFair. Outside of Green Philly, you can find her hiking, biking, traveling, or exploring Philadelphia. View all posts by Julie Hancher