PM2.5 AQI breakpoints have changed
As many of you know, on Dec. 14, 2012, US EPA took steps to protect the health of Americans from fine particle pollution by strengthening the annual health National Ambient Air Quality Standard...
View ArticleAirData will not be available on Saturday, Apr 20 from 3am to 11am (Eastern)
The database that AirData uses is being moved to new hardware. While this is happening the system will not be able to provide data. We anticipate the down time to be on Saturday, April 20th from 3am...
View ArticleThe AirData Site is experiencing technical problems
The AirData Site is experiencing technical problems. We are working to resolve them and will get AirData back on-line as soon as possible.
View ArticleAirData is up and running
The AirData website had technical problems yesterday afternoon. The problem has been resolved, and AirData is back up and running today. We're sorry for any inconvenience this may have caused you.
View ArticleAirData will not be available on Saturday, Apr 27 from 3am to 11am (Eastern)
The database that AirData uses is being moved to new hardware. While this is happening the system will not be able to provide data. We anticipate the down time to be on Saturday, April 27th from 3am...
View ArticleThe AirData Site is experiencing technical problems
The AirData Site is experiencing technical problems. We are working to resolve them and will get AirData back on-line as soon as possible.
View ArticleAirData is up and running
This morning's problem has been resolved, and AirData is back up and running today. We're sorry for any inconvenience.
View ArticleThe Concentration Map tool is fixed
This tool has been down for a few weeks. We are pleased to report that it is working again as of Monday, May 20th.
View ArticleThe Query Air Data (QAD) service is not working
We are currently experiencing network problems at our data center that prevent the QAD application from working. We have attempted corrective action, but without success. We will continue to try to...
View ArticleAirData will not be available on Saturday, September 7 from 6am to 12pm...
The AQS Data Mart will be down for scheduled maintenance on Saturday, September 7 from 6am to 12pm (Eastern). AirData tools will not be functional during this time.
View ArticleThe AirData Site is experiencing technical problems
The AirData Site is experiencing technical problems. We are working to resolve the problems and will post a notice to this feed as soon as is AirData back on-line.
View ArticleAirData is up and running
This morning's problem has been resolved, and AirData is back up and running. We're sorry for any inconvenience.
View ArticleQuery Air Data (QAD) application now working, but in a limited capacity
The problem with the QAD application were due to the architecture of the rawData (synchronous) service. When this service would fail it would cause all other services to fail. As a first step in...
View ArticleQuery Air Data (QAD) application functioning properly again
Several small parts of the QAD application have broken over the last few months, leading to large problems. We have fixed the critical problems and the application is working properly again. We are...
View ArticleAirData will not be available on Saturday, November 9 from 6am to 12pm (Eastern)
The AQS Data Mart will be down for scheduled maintenance on Saturday, November 9 from 6am to 12pm (Eastern). AirData tools will not be functional during this time.
View ArticleNational reports now available
The Air Quality Index Report and Air Quality Statistics Report now allow you to get results for the entire United States in one query.
View ArticleAirData will not be available on Saturday, December 21 from 6am to 12pm...
The AQS Data Mart will be down for scheduled maintenance on Saturday, December 21 from 6am to 12pm (Eastern). AirData tools will not be functional during this time.
View ArticlePlot multiple years now
The Concentration Plot now allows you to plot up to 25 years of data. Also, the daily value and date are displayed when you mouse-over a data point.
View ArticleNational-level data files available for download
Pre-generated files of data for the entire nation are now available at Download Data Files. These are files of our most commonly requested parameters at the annual, daily, and hourly summary levels.
View ArticleHourly file headers corrected
All of the hourly data files on the Download Data Files page included a mistake in the header. (There were columns in the header that were not present in the file: Sample Duration and Sample...
View ArticleNew Report - Annual Summary Report for Hazardous Air Pollutants
A Monitor Values Report for Hazardous Air Pollutants is now available.
View ArticleThe Download Data Files page has been updated
The Download Data Files page has been updated. Any new or changed data reported to EPA since the last update (in February 2014) has been updated in the files. You can use the “as of” date on the file...
View ArticleHAP Annual Summary Report - Units Conversion
In most reports of AQS data, the units of measure for most gaseous HAPs are PPBC. For this report the units of measure for gaseous HAPs were converted from PPBC to ug/m3 as follows: ug/m3=PPBC * MW *...
View ArticleThe Download Files page has been updated
The hourly files had incorrect GMT time values (all other values, including the local time, are correct). This has been corrected and all hourly files have been replaced with the correct data. We also...
View ArticleThe AirData Site is experiencing technical problems
The AirData Site is experiencing technical problems. We are working to resolve the problems and will post a notice to this feed as soon as is AirData back on-line.
View ArticleAirData is up and running
The AirData website had technical problems over the last several days. The problems have been resolved, and AirData is back up and running today. We're sorry for any inconvenience this may have caused...
View ArticleThe AirData Site is experiencing technical problems
The AirData Site is experiencing technical problems. We are working to resolve the problems and will post a notice to this feed as soon as is AirData back on-line. In the meantime, pre-generated data...
View ArticleAirData is up and running
The AirData website had technical problems over the last several days. The problems have been resolved, and AirData is back up and running today. We're sorry for the inconvenience.
View ArticleAirData will undergo scheduled maintenance on Friday, December 19 from 7am to...
AirData will undergo scheduled maintenance on Friday, December 19 from 7am to 11am (Eastern). AirData services may be intermittent during that period.
View ArticleAirData will undergo scheduled maintenance on Friday, January 9 from 11am to...
AirData will undergo scheduled maintenance on Friday, January 9 from 11am to 12pm (Eastern). AirData services may be intermittent during that period.
View ArticleThe “Download Data Files” page has been updated.
The “Download Data Files” page has been updated. All files have been updated to incorporate any new data that was submitted to EPA since the last update (June, 2014). If a file was changed, it will...
View ArticleAirData is down
The database is in restricted mode due to a problem with the overnight update. All AirData services are down temporarily. We apologize for the inconvenience.
View ArticleAirData is back online
Yesterday's database problems have been resolved and the system is back online. We apologize for the inconvenience.
View ArticleChanges to Data Download Files
The Download Files page has been updated with new data and many other changes. Please note that we have made several changes to the data files. These changes include changing the formats of several...
View ArticleAirData Update
The AirData website was recently updated to connect to the new AQS Data Mart. You may notice some changes, including faster query times for many tools. In particular, please note: Annual means (for...
View ArticleQuery Air Data has a new web site!
The Query Air Data (QAD) “endpoint” has moved. That means the URL used to access the interface or run queries has changed. The link on AirData has been changed to go to the new site. The new location...
View ArticleAirData offline Sunday evenings for weekly update
AirData will be offline WEEKLY from 6pm EST Sunday to 6am EST Monday for scheduled weekly database updates.
View ArticleThe “Download Data Files” page has been updated
The “Download Data Files” page has been updated. The “Download Data Files” page has been updated. All files have been updated to incorporate any new data that was submitted to EPA since the last...
View ArticleInteractive Map - a change is coming soon
We plan to replace the existing map application on AirData with a new one by the end of December 2015. The new application will display the same layers as the existing map and will provide the same...
View ArticleInteractive Map - new interface
The map application on AirData has been updated to be consistent with the EPA GeoPlatform. The new application displays the same layers as the previous application. Instructions for using the map are...
View ArticleAirData is down
The database is unavailable due to a problem with the overnight update. All AirData services are down temporarily. We hope to restore services by this afternoon and will post an update as soon as...
View ArticleNew map layers now available
The following map layers have been added to the interactive map: Nonattainment areas Tribal areas Federal Class 1 areas
View ArticleAirData will be offline due to scheduled maintenance from Saturday, July 2nd...
AirData will be offline due to scheduled maintenance from Saturday, July 2nd until Tuesday, July 5th.
View ArticleThe Download Data Files page has been refreshed with new data
The file download page has been refreshed with new data. Sorry for the delay, but many changes were being made to AQS that we needed to wait on. First, 1/2 MDL values have been removed. Historically,...
View ArticleAirData is down
The database is unavailable due to a problem with the overnight update. All AirData services are down temporarily. We hope to restore services later this afternoon and will post an update as soon as...
View ArticleAirData is down
The database is unavailable due to a problem with the overnight update. All AirData services are down all day today. We hope to restore services by tomorrow morning and will post an update as soon as...
View ArticleAirData will be offline today (Tuesday, August 9th)
The database is unavailable due to a problem with the overnight update. All AirData services are down all day today. We hope to restore services by tomorrow morning and will post an update as soon as...
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