National Center for Environmental Assessment (EPA)

Per- and polyfluoroalkyl substances in the environment

Over the past several years, the term PFAS (per- and polyfluoroalkyl substances) has grown to be emblematic of environmental contamination, garnering public, scientific, and reg...

Identifying the PECO: A framework for formulating good questions to explore the association of environmental and other exposures with health outcomes

[First paragraph] A clearly-framed question creates the structure and delineates the approach to defining research objectives, conducting systematic reviews and developing healt...

Attributing health effects to apportioned components and sources of particulate matter: An evaluation of collective results

Exposure to Ambient and Nonambient Components of Particulate Matter

These results demonstrate the usefulness of separating total personal particle exposures into their ambient and nonambient components. The results support previous epidemiologic...

Panel discussion review: session 1 — exposure assessment and related errors in air pollution epidemiologic studies