{"id":159553,"date":"2026-06-03T13:45:05","date_gmt":"2026-06-03T18:45:05","guid":{"rendered":"https:\/\/www.thelocalvoice.net\/oxford\/?p=159553"},"modified":"2026-06-09T18:23:19","modified_gmt":"2026-06-09T23:23:19","slug":"even-safe-air-pollution-levels-can-carry-health-risks","status":"publish","type":"post","link":"https:\/\/www.thelocalvoice.net\/oxford\/even-safe-air-pollution-levels-can-carry-health-risks\/","title":{"rendered":"Even ‘Safe’ Air Pollution Levels Can Carry Health Risks"},"content":{"rendered":"\n

Ole Miss review of studies finds health implications below current EPA air quality standards<\/strong><\/h2>\n\n\n\n

Air pollution does not have to exceed federal limits to potentially harm human health, according to a new published study from the University of Mississippi<\/strong>.<\/p>\n\n\n\n

In a review of decades of air pollution studies,\u00a0Ole Miss<\/strong><\/a>\u00a0researchers found evidence that exposure to PM2.5 \u2013 microscopic particles produced by traffic, industry and smoke \u2013 may harm heart health even at concentrations below the\u00a0Environmental Protection Agency<\/strong>‘s<\/a>\u00a0regulatory guidelines. The review was published in\u00a0Environmental Pollution<\/strong>.<\/a><\/p>\n\n\n\n

“In the United States, having regulations in place through the EPA allows us to track areas of nonattainment, or when the (air pollution) concentrations are above regulations,” said Courtney Roper<\/strong>, assistant professor of environmental toxicology. “If we can identify that (an area) is above regulation, then we have the power to do something about it.<\/p>\n\n\n\n

\"\"<\/a>
Courtney Roper. Photo by Kevin Bain\/Ole Miss Digital Imaging Services<\/figcaption><\/figure>\n\n\n\n

“If we were looking to make a regulation that was just focused on human health, our reviews suggest that the regulation should be lowered because we are seeing cardiovascular impacts.”<\/p>\n\n\n\n

PM2.5 is a size category of air pollution where particles are less than 2.5 microns across. In comparison, a human hair is about 50 to 70 microns<\/a>. When inhaled, PM2.5 particles are small enough to pass through the lungs and into the bloodstream<\/a>, where they can affect many areas of the body.<\/p>\n\n\n\n

The researchers reviewed 95 studies from around the world on the impact of low-level PM2.5 exposure on cardiovascular health. Some 67% of the studies showed significant associations with heart disease.<\/p>\n\n\n\n

Certain populations \u2013 such as older adults, very young children, people with preexisting heart conditions, impoverished individuals and marginalized populations \u2013 were particularly vulnerable to low-level exposure.<\/p>\n\n\n\n

“The risk is also dependent upon the source of PM2.5,” said James Stewart<\/strong>, associate professor of pharmacology. “Whether it’s traffic pollution or manufacturing industrial pollution, or even rural pollution, where you have\u00a0harvesting or\u00a0plowing generating dust, that can\u00a0impact human health on so many levels.<\/p>\n\n\n\n

\"\"<\/a>
James Stewart. Photo by Thomas Graning\/Ole Miss Digital Imaging Services<\/figcaption><\/figure>\n\n\n\n

“We, the public, don’t recognize how detrimental it can be.”<\/p>\n\n\n\n

Exposure to PM2.5 can affect the buildup of plaque in the walls of the arteries, possibly leading to blood clots, heart attacks, strokes<\/a> or other forms of heart disease. Cardiovascular disease is the leading cause of death worldwide<\/a> and the No. 1 cause of death in Mississippi<\/a>.<\/p>\n\n\n\n

“While this article was looking only at cardiovascular effects, it doesn’t just stop there,” Stewart said. “Once it gets into the circulatory system, it can impact other organs like the liver, pancreas, kidneys or any (organ) that deals with blood, and blood goes everywhere.<\/p>\n\n\n\n

“In Mississippi it’s very relevant because we have rural and industrial and urban pollutants. If individuals have an underlying condition, then it can make that condition worse.”<\/p>\n\n\n\n

Roper’s previous research has found elevated levels of one PM2.5 component, soot,<\/a>  across multiple locations in Mississippi and linked exposure to an increase in respiratory-related hospital admissions<\/a> in Jackson.<\/p>\n\n\n\n

For people in vulnerable populations, Roper and Stewart advise considering certain precautions.<\/p>\n\n\n\n

“What I would suggest to someone who is concerned is to look at some of the existing resources for air quality and be mindful of how that changes in your area,” Roper said. “On days that the air quality is poor, limit your time outdoors or take precautions like home air filtration or wearing a mask on particularly bad days.”<\/p>\n\n\n\n

High-efficiency particulate air filters<\/a> can remove particles as small as 0.03 microns, and N95 masks can filter PM2.5 pollution<\/a>. Air quality reports are available daily on most weather applications, including those on Apple and Android smartphones.<\/p>\n\n\n\n

“Public awareness is the next step,” Stewart said. “We need to increase education and general public awareness around this problem. Health care workers should be paying attention to fluxes in pollution to better address health needs of patients.<\/p>\n\n\n\n

“The question is not just, ‘How can we treat exposure?’ but ‘How can we prevent it?’ That starts with public awareness.”<\/p>\n\n\n\n

By Clara Turnage<\/em><\/p>\n\n\n\n

\"\"<\/a><\/figure>\n","protected":false},"excerpt":{"rendered":"

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