Human Health Exposure Analysis Resource (HHEAR)

Human Health Exposure Analysis Resource

The Human Health Exposure Analysis Resource, or HHEAR, seeks to advance understanding of the influence of the environment on human health over a lifetime. HHEAR provides researchers access to high-quality, exposure-assessment services including, state-of-the-art laboratory analysis of biological and environmental samples, statistical analysis, and expert consultation on exposure analysis, study design, and data analysis and interpretation. There is no cost to the investigator. Find out more about HHEAR.

Learn how to apply for HHEAR services

Create MYHHEAR Account

Opportunities to Receive Sample Collection Devices for Pilot Studies

Find out more about this opportunity.

HHEAR Brochure

Download and share the HHEAR Brochure (PDF).

National Exposure Assessment Laboratory Network

Providing both targeted and untargeted environmental exposure analyses in human biological and environmental samples.

Data Repository, Analysis, and Science Center

Providing statistical services, a data repository, and data standards for integration and sharing.
Find out about recent updates to the HHEAR data repository.

Application Submission and Review Dates

Round 8 Initial Application Submission Deadline:
November 12, 2021.

See the full Application Submission and Review Schedule.

CHEAR Moving Forward

NIEHS funded the CHEAR program from 2015-2019 to provide NIH researchers access to laboratory and statistical analysis services for adding exposure assessment to their studies of children’s health. Moving forward, the CHEAR program has been replaced by HHEAR.

New requests for CHEAR services are no longer being accepted.
Researchers can search CHEAR studies and download public de-identified datasets through the CHEAR Data Center.
Researchers with active CHEAR projects can continue to access their myCHEAR account to track the progress of their projects

Go to myCHEAR

Analytes for Exposure to DNA-Damaging Agents

DNA damage can be measured by quantifying DNA adducts with highly-sensitive liquid chromatography-mass spectrometry (LC-MS) assays. For more details see Exposure to DNA-Damaging Agents.

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