Air Quality and Emissions
Trends Report This annual publication describes trends in emissions and air
concentrations for ozone, particulate matter and other common pollutants
during the past ten years and assesses the current status of our
nation's air quality. Reports are available online for several years.
The Regional Transport of
Ozone (1998) (PDF, 4 pp, 249 KB) EPA
brochure describing a rule known as the "NOx SIP Call," designed to reduce
regional emissions of ozone-contributing nitrogen oxides during the
summertime ozone season. NOx also contributes to the formation of particle
and Your Health(PDF, 2 pp, 449 KB) This
short, colorful pamphlet tells who is at risk from exposure to ozone, what
health effects are caused by ozone, and simple measures that can be taken to
reduce health risk.
Good Up High, Bad Nearby(PDF, 2 pp, 1391 KB)
Ozone acts as a protective layer high above the earth, but it can be harmful
to breathe. This publication provides basic information about ground-level
and high-altitude ozone.
Smog - Who
Does it Hurt?(PDF, 10 pp, 819 KB) This
8-page booklet provides more detailed information than "Ozone and Your
Health" about ozone health effects and how to avoid them.
Quality Criteria Document for Ozone (February 2006) This comprehensive
assessment of scientific data about the health and environmental effects of
ground-level ozone is an important part of EPA's review of its ozone
This section includes links to domestic and international organizations that
perform stratospheric ozone research, ozone depletion related measurement and
monitoring, and other sources of stratospheric ozone science information.
UNEP Ozone Secretariat - The
Secretariat for the Vienna Convention for the Protection of the Ozone Layer
and for the Montreal Protocol on Substances that Deplete the Ozone Layer.
EPA's Ultraviolet Monitoring Program
- EPA operates and maintains a network of Brewer spectrophotometers
throughout the United States, measuring full-sky spectrally-resolved solar
radiation in the UV-B and UV-A bands. Visitors can create graphs of daily UV
and ozone levels and download the data.
Air Quality and Emissions
This annual publication describes trends in emissions and air concentrations
for ozone, particulate matter and other common pollutants during the past
ten years and assesses the current status of our nation's air quality.
Reports are available online for several years.
NOx -- How
Nitrogen Oxides Affect the Way We Live and Breathe - 1998
EPA tracks emissions of six principal air pollutants - carbon monoxide,
lead, nitrogen oxides, particulate matter, sulfur dioxide, and volatile
organic compounds. All have decreased significantly since passage of the
Clean Air Act in 1970 -except for nitrogen oxides (NOx). This brochure tells
about this pollutant and the steps that EPA is taking to reduce its
(Compilation of Air Pollutant Emission Factors) The Compilation of Air Pollutant Emission Factors, AP-42, is the
authoritative source of information for estimating emissions of air
pollutants from industrial, commercial, and residential sources. This
page contains links to PDF and WordPerfect versions of each of the AP-42
chapters, as well as a link to OAQPS contacts for AP-42.
Green Book Extensive information about nonattainment areas and National Ambient Air
Quality Standards for the six criteria pollutants.
Effects Notebook for Hazardous Air Pollutants - Here you can
obtain fact sheets that give detailed information about the effects on
human health of substances defined as hazardous by the 1990 amendments
of the Clean Air Act. There's also an explanation of topics and terms
used in the fact sheets.