EPA Affirms National Air Quality Standards for Carbon Monoxide Are Protective of Public Health/Air monitoring updates will put more focus on urban communities located near roa...
WASHINGTON – After a careful review of the science, the
U.S. Environmental Protection Agency (EPA) is affirming the current
national air quality standards for carbon monoxide (CO). The
science shows that the current standards protect public health,
including those who are most susceptible, and the environment.
Since 1980, levels of CO in the air have fallen by 80 percent,
mostly as a result of motor vehicle emissions controls.
CO is a colorless, odorless gas emitted from combustion processes.
Nationally, and particularly in urban areas, the majority of CO
emissions come from motor vehicles. CO can cause harmful health
effects by reducing oxygen delivery to the body’s organs
(like the heart and brain) and tissues.
To ensure people are protected from unhealthy concentrations of CO
and to develop better information about CO and its health impacts,
EPA is revising the air monitoring requirements.The changes will require
a more focused monitoring network with CO monitors placed near
roads in 52 urban areas with populations of 1 million or
more.
Monitors in areas with populations of 2.5 million or more are
required to be operational by January 1, 2015 and monitors required
in areas with populations of 1 million or more are required to be
operational by January 1, 2017. These new monitoring
sites will give EPA important data about CO levels that may be
affecting public health in neighborhoods located near busy
roadways. The data will also be used to determine compliance with
the current standards and to help inform future reviews of the
standard.
The current health standards are 9 parts per
million (ppm) measured over 8 hours, and 35 ppm measured over 1
hour. CO levels at monitors across the country are quite low and
are well within the standards, showing that federal, state and
local efforts to reduce CO pollution have been successful and are
providing important public health protections to all
Americans.
The rule is consistent with the advice and
recommendations from the agency’s independent science
advisors, the Clean Air Act Scientific Advisory Committee.
More information: https://www3.epa.gov/airquality//