What Are Forever Chemicals in Water and How Can You Limit Exposure?

PFAS, often called forever chemicals, can show up in drinking water. Here is what they are and practical ways to reduce your exposure at home.

Kitchen tap filling a glass of clean water next to a water filter jug

“Forever chemicals” is the nickname for PFAS (per- and polyfluoroalkyl substances), a large group of man-made chemicals that break down very slowly. They have been used in non-stick cookware, food packaging, stain-resistant products and firefighting foam, and they can end up in water supplies.

Why people are concerned

Because PFAS persist in the environment and in the body, researchers are studying how long-term exposure may affect health. Health agencies have set or proposed limits for certain PFAS in drinking water.

Practical ways to limit exposure

  1. Find out what’s in your water. Ask your local utility for its annual water quality report, or use a certified lab to test a private well.
  2. Use a certified filter. Look for filters certified to reduce PFAS, such as reverse osmosis or activated carbon systems, and replace cartridges on schedule.
  3. Skip boiling. Boiling does not remove PFAS and can concentrate them.
  4. Rethink cookware and packaging. Choose stainless steel, cast iron or glass where you can, and limit heavily greaseproof packaged foods.
  5. Keep it in perspective. Don’t stop drinking water. Focus on practical steps and follow local advisories.

If you are pregnant, have a health condition, or are worried about exposure, talk with your doctor.

This article is for general information and does not replace medical advice.

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