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Basic Information

Research Mission

The National Exposure Research Laboratory’s (NERL) Human Exposure and Atmospheric Sciences Division (HEASD) conducts research in support of EPA’s mission to protect human health and the environment.  HEASD’s research program supports Goal 1 (Clean Air) and Goal 4 (Healthy People) of EPA’s strategic plan.  More specifically, our division conducts research to characterize the movement of pollutants from the source to contact with humans.  Our multidisciplinary research program produces Methods, Measurements, and Models to identify relationships between and characterize processes that link source emissions, environmental concentrations, human exposures, and target-tissue dose.  The impact of these tools are improved regulatory programs and policies for EPA.

Exposure Science Diagram
Figure 1.  Exposure Science in the Source to Effects Continuum

HEASD’s exposure science characterizes and links the boxes in the source-to- effects paradigm.  HEASD’s core research activities include:


HEASD has six research branches, five located in Research Triangle Park, NC (RTP), and one in Las Vegas, NV.  HEASD’s research branches are supported by a program operations staff (POS), who are located in RTP:

 Human Exposure & Atmospheric Sciences Division Immediate Office Program Operations Staff Environmental Characterization & Apportionment Branch Exposure & Dose Research Branch Exposure Measurements & Analysis Branch Exposure Modeling Research Branch Methods Development & Application Branch Process Modeling Research Branch




Research Triangle Park, NC:
Map and Location of Campus


Las Vegas, NV:
Closeup Map of Building Complex
Detailed Map of Local Area (PDF, 1pp., 398 KB,
About PDF)


Human Exposure and Atmospheric Sciences

Research & Development | National Exposure Research Laboratory

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