Terms & Conditions
By using this tool, you confirm that you are a qualified researcher and agree to our Terms and Conditions of Use, including the disclaimer of liability. Use of this tool is entirely at your own risk.
APEX converts residential address histories into annual air pollution exposure estimates, using state-of-the-art satellite-derived datasets for PM2.5 and NO2. The tool supports both individual lookups and batch uploads, making it suitable for clinical, epidemiologic, and population-level research.
For help preparing input files or understanding output values, visit the Instructions and FAQ pages.
If you use APEX in any published work, we kindly ask that you cite the forthcoming manuscript:
Durney, C.H., Tawara, A., Brauer, M., Atkar-Khattra, S., Myers, R., Meza, R., Lam, S. APEX: A Web-Based Tool for Estimating Long-Term PM2.5 Exposure from Residential History - Brief Report (currently under review at JTO Clinical and Research Reports) and the appropriate data source.
Please make note of the version number for data integrity.
Current Version
Version 1.0
- PM2.5 data: V5.GL.06 at 0.01×0.01° resolution — satpm.org/v5-gl-06
- NO2 data: Version V1 at 0.01×0.01° resolution — Cooper, M. (2022). Satellite-derived ground level NO2 concentrations, 2005–2019 (Version v1) [Data set]. Zenodo.