1999 DRAFT Ambient Concentration Data Tables
Note: EPA no longer updates this information, but it may be useful as a reference or resource.
Pollutant-Specific Tables:
View (or download) a pollutant data table by selecting a pollutant
from the list below, then clicking a button for the file format you
want (Adobe PDF or Excel spreadsheet). A table contains county average
ambient concentration, percentile distributions (concentration range),
contributions from major,
area, onroad
mobile, and nonroad
mobile sources, and background
concentration for the pollutant you select. A table includes ambient
concentration values for every U.S. county plus Puerto Rico and the
Virgin Islands. To better understand the measurement units presented in these files please access this detailed explanation<.a> in MS Word format. |
| View
or Download a Pollutant-Specific Table: |
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State Summary Tables:
View (or download) a state data table by selecting a state from the
list below, then clicking a button for the file format you want (Adobe
PDF or Excel spreadsheet). A table contains county average ambient
concentration, percentile distributions (concentration range), contributions
from major,
area, onroad
mobile, and nonroad
mobile sources, and background
concentration of each pollutant for each county in the State you
select. To better understand the measurement units presented in these files please access this detailed explanation<.a> in MS Word format. |
| View
or Download a State Summary Table: |
|
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