Clean Air Board files comments to EPA on PM2.5 standards

March 27, 2023 – The Clean Air Board of Central Pennsylvania submitted comments to the US Environmental Protection Agency on proposed revisions to the air quality standards for fine particulate (soot). CAB urged EPA to tighten the standards to protect vulnerable populations and the general public. Recent medical studies have shown that even low levels of airborne soot pollution can cause harmful health problems. CAB asked EPA to adopt an annual standard of 8 micrograms per cubic meter (8 ug/m3) and a 24-hour standard of 25 micrograms per cubic meter (25 ug/m3). Read the CAB comments.