Air Toxics Data Archive System

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Welcome to the Air Toxics Data Archive...

The purpose of this web site is to provide online access to data about toxic substances in the air. Analyses of these data will provide information about the spatial patterns, temporal profile, and general characteristics of various air toxic compounds.

The ATDA (Air Toxics Data Archive) web site is sponsored by the STAPPA/ALAPCO/USEPA Air Toxics Monitoring Subcommittee and is part of the ongoing work to support the deployment of a national air toxics monitoring network.

Website Features

Air Toxics Database
Use our powerful Query Wizard to query the Air Toxics Archive Database. Search by monitoring program, pollutant, monitoring site/location, and date range. Specify various formatting options and choose to receive your data in a "smart grid", HTML table, or ASCII text file.

Air Toxics Metadata
Browse the collection of metadata available for the Air Toxics Archive. The following metadata information is currently available:

Programs - Sites - Pollutants - Graphical Browser

Air Toxics Project Reports
View various reports2 about the data in the archive and information derived from the data. Browse numerous statistical analyses and summaries, as well as monitoring network design recommendations derived from the analyses.

Air Toxics Top Ten List

Substance Name	CAS Registry #	Substance Class
Benzene	71-43-2	Volatile Organic Compound (VOC)
1,3-Butadiene	106-99-0	Volatile Organic Compound (VOC)
Chloroform	67-66-3	Volatile Organic Compound (VOC)
Tetrachloroethylene	127-18-4	Volatile Organic Compound (VOC)
Acetaldehyde	75-07-0	Carbonyl
Formaldehyde	50-00-0	Carbonyl
Cadmium	7440-43-9	Metal
Chromium	7440-47-3	Metal
Lead	7439-92-1	Metal
Mercury	7439-97-6	Metal

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