Air Quality: EPA's Integrated Science Assessments (ISAs) Project
Plan for Air Quality Criteria for Lead Archived files are
provided for reference purposes only. The file was current when
produced, but is no longer maintained and may now be outdated.
Persons with disabilities having difficulty accessing archived
files may contact the NCEA Webmaster for assistance. Please
visit http://epa.gov/ncea to access current information. Section
108 (a) of the Clean Air Act directs the Administrator to
identify certain pollutants which may reasonably be anticipated
to endanger public health and welfare and to issue air quality
criteria for them. These air quality criteria are to accurately
reflect the latest scientific knowledge useful in indicating the
kind and extent of all identifiable effects on public health or
welfare which may be expected from the presence of [a] pollutant
in the ambient air . . . . Under section 109 of the Act, EPA is
then to establish National Ambient Air Quality Standards (NAAQS)
for each pollu