Common Contracts
1 similar null contracts
Cooperative Agreement No. R-82806201April 27th, 2005
The entire eastern half of Texas experiences annual average concentrations of fine particulate matter (specifically PM less than 2.5 µm in aerodynamic diameter, or PM2.5) in the range of 10- 12 µg/m3. Superimposed on these background concentrations are regions in southeastern Texas in which industrial and urban emissions drive annual average concentrations of fine PM to approximately 15 µg/m3. These high background concentrations, with local hot spots, located in a region of high population density (Houston is the fourth most populous city in the United States), result in high exposures to fine PM. At the time this program was initiated, a report performed under contract to the City of Houston estimated that approximately 2.5 million people in the Houston urban area in southeast Texas are exposed to annual average PM concentrations in excess of 15 µg/m3 (Lurmann, et al., 1999).
