; (2) have, or are substantially impacted by, significant emissions of ozone, PM2.5, or sulfur dioxide; and (3) are not part of an area designated as nonattainment under the Clean Air Act for the air pollutant or pollutants to be monitored. (d) Contracts The Administrator shall contract with qualified nonprofit organizations and State and local air pollution control agencies to execute deployment of the monitors in a manner that will ensure representative measurement of ambient air quality, and provide the public with real-time online access to the data collected. (e) Determination and installation Not later than 6 months after one year of monitoring with sensors deployed pursuant to subsection (a) has been completed, the Administrator shall determine whether data from the sensor or sensors deployed in a census track or county show air pollution levels during such year reached 98 percent of the national ambient air quality standard for any of the air pollutants described in subsection (b), and not later than 6 months after such determination, the Administrator shall ensure that Federal Reference Method monitors or Federal Equivalent Method monitors are installed and in operation within the census tract or county for each pollutant that reached or exceeded the 98 percent level. (f) Authorization of appropriations There is authorized to be appropriated to carry out this section $2,500,000. 6. Environmental health disparities research grant programs (a) Centers of excellence on environmental health disparities research grants The Director of the National Institutes of Health, in coordination with the National Center for Environmental Research at the Environmental Protection Agency, shall carry out a Centers of Excellence on Environmental Health Disparities Research grant program. Such program shall establish and support no fewer than 10 research centers with 5 year awards to— (1) conduct basic and applied research on environmentally driven health disparities