Dataset Overview

Aerosol monitoring reports at PMRC

See Full Dataset Documentation


To determine concentrations and composition of fine aerosols (PM-2.5) of relevance to light scattering, light absorption, human health and biological effects.

Data Collection Status

Data collection for this dataset is ongoing

Start date



3942 records with 115 fields

Data Availability

Available for download

Data License

CC BY-NC-SA - Attribution, Non-commercial, Share alike license logo

Preferred Citation

Malm, W. C., J. F. Sisler, D. Huffman, R. A. Eldred, and T. A. Cahill (1994), Spatial and seasonal trends in particle concentration and optical extinction in the United States, J. Geophys. Res., 99, 1347-1370. FEMC. Can be found at:

Update Frequency


Maintenance Plan



  • PM 2.5 Visibility (IMPROVE) >> US EPA
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    Previous Versions
      • Version 1 - 358_init (created 2017-03-30 by Judy Rosovsky)