Technology Transfer Network (TTN)
Air Quality System (AQS)

Training - Schedule of upcoming training sessions and training materials available for downloading.

Contacts - Contact information for AQS and CDX help, EPA headquarters and regional staff as well as state/local/tribal representatives.

Related Links - Links to other sites that have information related to Air Quality.

Basic Information - Brief description of the purpose of the Air Quality System.

AQS Web Application - Pathway to the AQS web application where registered users load and maintain AQS data, and retrieve reports. Release notes are also found here.

AQS Discoverer Pathway to the web version of the ad hoc query tool from Oracle Corporation. (For registered users only.)

Manuals & Guides - AQS Manuals and User Guides available for on-line browsing or downloading, including the AQS Coding Manual, Data Dictionary, Input Transaction Format, and User Guides.

Obtaining AQS Data - How to get AQS data if you are not a registered AQS user or you need detailed data for years prior to 10 years ago. There are also links to over 100 files with national data for downloading.

Precision & Accuracy Data - Brief description of the difference between P& A data and other AQS data, and spreadsheets to generate P& A data in data input transaction format.

AQS Conferences - Information about upcoming conferences and handouts from the previous conferences. These conferences are generally held once each year.

Frequent Questions - Questions and answers about AQS, sorted by topic.

Memos - Memos and E-mails generally sent to all registered AQS users. (Release notes for the AQS Web application are found via the AQS Web Change Log page.)

User Registration - Steps to obtain an AQS User ID. Generally, only personnel from federal, state, local, or tribal agencies providing data to the EPA or analyzing that data for their agency may register.