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Simple ways to stay hydrated this summer

Total PFAS (forever chemicals) are a family of human-made compounds that have been in use since the 1940s, in everything from nonstick cookware to water-resistant fabric to food packaging.

The nickname comes from how they behave once they are out in the world. They do not break down. They persist in soil and in water, and they turn up in supplies across the country.

Person pouring filtered water from a pitcher into a glass.

That is part of what makes them hard to grade. Lead has been regulated for decades and the standards are well established. Total PFAS is still treated as an emerging contaminant, with limits regulators are actively revising and scrutiny that keeps growing.

When Culligan analyzed publicly available water quality data for 50 college towns, Total PFAS was measured across five members of the family: PFOS, PFOA, PFHxS, PFNA, and GenX.

Nearly one in three of those towns received a grade of C or lower.

See how US cities scored

Read the full methodology

You cannot see, taste it or smell Total PFAS in a glass of water.

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29:Tcdc,Free shipping on U.S. orders over $55 [Culligan | Free U.S. Ground Shipping on All Orders Over $99](https://shop.culligan.com/) [Culligan | Free U.S. Ground Shipping on All Orders Over $99](https://shop.culligan.com/) [Simple ways to stay hydrated this summer](https://shop.culligan.com/pages/college-water) Total PFAS (forever chemicals) are a family of human-made compounds that have been in use since the 1940s, in everything from nonstick cookware to water-resistant fabric to food packaging.The nickname comes from how they behave once they are out in the world. They do not break down. They persist in soil and in water, and they turn up in supplies across the country. [Person pouring filtered water from a pitcher into a glass.](http://shop.culligan.com) That is part of what makes them hard to grade. Lead has been regulated for decades and the standards are well established. Total PFAS is still treated as an emerging contaminant, with limits regulators are actively revising and scrutiny that keeps growing. When Culligan analyzed publicly available water quality data for 50 college towns, Total PFAS was measured across five members of the family: PFOS, PFOA, PFHxS, PFNA, and GenX. Nearly one in three of those towns received a grade of C or lower. [See how US cities scored](https://shop.culligan.com/pages/college-water) [Read the full methodology](https://shop.culligan.com/blogs/filtration/college-town-water-quality-study-2026) You cannot see, taste it or smell Total PFAS in a glass of water. 30% off 10 cup pitchers [GIF of the 10 cup pitcher in different colors](https://shop.culligan.com/products/10-cup-zerowater-pitcher) https://shop.culligan.com/products/10-cup-zerowater-pitcher [Save 30%](https://shop.culligan.com/products/10-cup-zerowater-pitcher) 20% off 2-packs [Culligan with ZeroWater Technology Filter](https://shop.culligan.com/products/zerowater-replacement-filter) [Culligan Zerowater Technology](https://shop.culligan.com/collections/zerowater-technology) [Save 20%](https://shop.culligan.com/products/zerowater-replacement-filter) [ZeroWater Technology Filter](https://shop.culligan.com/products/legacy-zerowater-replacement-filter) [Culligan Zerowater Technology](https://shop.culligan.com/collections/zerowater-technology) [Save 20%](https://shop.culligan.com/products/legacy-zerowater-replacement-filter) [SHOP](https://shop.culligan.com/) [SHOP](https://shop.culligan.com/) [TERMS OF USE](https://shop.culligan.com/policies/terms-of-service) [TERMS OF USE](https://shop.culligan.com/policies/terms-of-service) [SUPPORT](https://shop.culligan.com/pages/support) [SUPPORT](https://shop.culligan.com/pages/support) [BLOG](https://shop.culligan.com/blogs/filtration) [BLOG](https://shop.culligan.com/blogs/filtration) [FAQ](https://shop.culligan.com/pages/faqs) [FAQ](https://shop.culligan.com/pages/faqs) [CULLIGAN WITH ZEROWATER TECHNOLOGY](https://shop.culligan.com/) 9399 W Higgins Road Suite 1100. 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