Thousands of lives would be saved each year, and many more serious illnesses avoided, if U.S. counties met standards set by the American Thoracic Society for the two most important air pollutants, according to a new report by the ATS and the Marron Institute of Urban Management at New York University.

The ATS’s standards for ozone (O3) and fine particulate matter (PM2.5) are more protective than those adopted by the U.S. Environmental Protection Agency. If the ATS’s standards were met, each year in the U.S. approximately:

  • 6,270 lives would be saved,
  • 15,300 instances of serious illness would be avoided and
  • 7 million missed school and work days would be eliminated.

The “ATS and Marron Institute Report: Estimated Excess Morbidity and Mortality Associated with Air Pollution above ATS-Recommended Standards, 2013-2015” is published in the May 1 issue of the Annals of the American Thoracic Society. The new report builds on the two organizations’ 2016 “Health of the Air Report” by using the latest air quality data available. The latest report includes two new measures–short-term PM2.5 and lung cancer incidence–to give a clearer picture of how air pollution impacts health in the U.S.

The ATS-recommended standards for O3 and PM2.5 are based on scores of national and international epidemiological, animal and human-exposure studies. These standards are more rigorous than National Ambient Air Quality Standards (NAAQS) for both O3 and PM2.5 that the EPA relies upon.

The ATS recommends:

  • A 0.060 parts per million (ppm) 8-hour standard for O3, rather than the EPA’s 0.070 ppm standard. Eighty-two percent of monitored counties failed to meet this ATS standard.
  • An 11 micrograms per cubic meter (µg/m3) annual standard for PM2.5, rather than the EPA’s 12 µg/m3. Eight percent of monitored counties failed to meet this ATS standard.
  • A 25 µg/m3 short-term (24 hours) standard for PM2.5 rather than the EPA’s 35 µg/m3. Twenty-one percent of monitored counties failed to meet this ATS standard.

“In addition to highlighting the benefits of strengthening the NAAQS, this report can help guide local and regional air quality management decisions,” said report co-author Gary Ewart, MHS, chief of the ATS advocacy and government relations program. “The report’s local health estimates can help public officials make difficult decisions regarding how aggressively to adopt new technologies or, alternatively, how aggressively to restrict high-polluting sources.”

Lead report author Kevin Cromar, PhD, director of the Air Quality Program at the Marron Institute and associate professor of population health and environmental medicine at the NYU School of Medicine, added, “Metropolitan areas and states with large populations and elevated concentrations of one or both air pollutants would realize the biggest improvements in public health by meeting the more protective standards.”

The 10 metropolitan areas that would benefit the most from meeting the ATS O3 and PM2.5 standards are:

  • Los Angeles (Long Beach-Glendale), CA: 941 lives saved, 2,670 fewer morbidities, and 2,250,000 fewer impacted days
  • Riverside (San Bernardino-Ontario), CA: 609 lives saved, 1,250 fewer morbidities, and 1,100,000 fewer impacted days
  • Bakersfield, CA: 369 lives saved, 513 fewer morbidities, and 247,000 fewer impacted days
  • Fresno, CA: 244 lives saved, 458 fewer morbidities, and 359,000 fewer impacted days
  • Pittsburgh, PA: 205 lives saved, 382 fewer morbidities and 197,000 fewer impacted days
  • Phoenix (Mesa-Scottsdale), AZ: 178 lives saved, 432 fewer morbidities, and 453,000 fewer impacted days
  • New York (Jersey City-White Plains), NY-NJ: 166 lives saved, 626 fewer morbidities, and 492,000 fewer impacted days
  • Houston (The Woodlands-Sugar Land), TX: 163 lives saved, 508 fewer morbidities and 476,000 fewer impacted days
  • Visalia (Porterville), CA: 144 lives saved, 199 fewer morbidities and 109,000 fewer impacted days
  • Philadelphia, PA: 132 lives saved, 218 fewer morbidities and 136,000 fewer impacted days

On a state-wide basis, California alone is responsible for half the total estimated deaths, while the next highest impacted states—Pennsylvania, Texas, Arizona, Michigan, Ohio, New York and New Jersey—contribute nearly 30 percent of the total mortality impact.