PFAS

 PFAS stands for Per- and Polyfluoroalkyl Substances. They are a large group of human-made chemicals widely used since the 1940s because they resist water, oil, grease, and heat. They’re often called “forever chemicals” because they do not break down easily in the environment or the human body.

What PFAS Are

PFAS are thousands of related chemicals built around strong carbon-fluorine bonds, one of the strongest bonds in chemistry. Because of this stability, they persist for decades in soil, water, and living organisms.

Some well-known PFAS include:

• Perfluorooctanoic acid (PFOA)
• Perfluorooctanesulfonic acid (PFOS)

These two were historically the most widely used and are now heavily restricted in many countries.

Where PFAS Are Found

PFAS have been used in many everyday products:

• Non-stick cookware (e.g., coatings like Teflon)
• Waterproof clothing and outdoor gear
• Grease-resistant food packaging (pizza boxes, fast-food wrappers)
• Firefighting foams used at airports and military bases
• Stain-resistant carpets and furniture
• Some cosmetics and personal care products

Why PFAS Are a Concern

Research links long-term exposure to several health risks, including:

• Increased cholesterol levels
• Reduced immune system response
• Thyroid problems
• Fertility issues
• Higher risk of certain cancers (e.g., kidney and testicular cancer)

Many studies on PFAS contamination came from communities affected by industrial pollution, such as the case linked to the chemical company DuPont.

Environmental Impact

PFAS can spread widely because they move easily through water. They have been detected in:

• Drinking water supplies
• Rivers and groundwater
• Soil and wildlife
• Human blood worldwide

A major contamination example is tied to firefighting foams used by the United States Department of Defense.

Current Regulation

Different regions are starting to regulate PFAS:

• The United States Environmental Protection Agency has proposed strict drinking-water limits.
• The European Union is considering broad bans on most PFAS chemicals.

✅ In short: PFAS are durable industrial chemicals that are extremely useful but environmentally persistent and potentially harmful to human health.

If you want, I can also explain:

• Why PFAS are called “forever chemicals” in more scientific detail
• How PFAS get into drinking water
• Which products still contain PFAS in 2026.