Articles
Frequently Asked Questions (FAQs) about PFAS
PFAS stands for Per- and polyfluoroalkyl substances, and are a group of man-made chemicals that have been used since the 1940s in a wide variety of products.
Updated:
August 27, 2025
This page provides you with links to Penn State Extension articles that address some of the frequently asked questions about PFAS — what they are, where they come from, why people are talking about them, how to test, how to interpret results, actions you can take to manage PFAS issues, and ongoing research and policy updates.
- Understanding PFAS - What They Are, Their Impact, and What We Can Do
- PFAS Drinking Water Standards, Testing, and Treatment
- PFAS in Pennsylvania Groundwater and Factors Influencing Occurrence
- County-Level Summary of PFAS in Pennsylvania Drinking Water Sources
- Per- and polyfluoroalkyl substances (PFAS) and Human Health
- FAQ: PFAS Testing Services and Laboratories Directory
- FAQ: PFAS Water Testing for Irrigation, Livestock, and Household Water Systems
- FAQ: PFAS Testing for Soils and Crop Tissues
- FAQ: PFAS Test Results - What Do the Numbers and Acronyms Mean?
- Home Water Treatment for PFAS
- FAQ: PFAS in Surface Waters Sources and Fish
- An Overview of PFAS and Land-Applied Biosolids
- FAQ: Why aren't PFAS Compounds in Land-Applied Biosolids Regulated by EPA?
- FAQ: How are PFAS Issues Managed on the Farm?
- Reducing Exposure to PFAS at Home
- Institute for Sustainable Agriculture and Environmental Science (SAFES) PFAS in Agroecosystems Research and Extension Network
