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Contact Us

phone Air Quality System Office (National Air Data Group)
Call the Air Quality System office at 919 541-4946 (FAX us at 919 541-7674), or call or email one of the team members listed below.

mail Regular or Certified Mail
Research Triangle Park, NC  27711

phone EPA Call Center

AQS application User Support is provided through the EPA Call Center, operated under contract to the EPA.
The toll free number is 1-866-411-4EPA (4372).
TDD: 1-866-489-4900
International callers:  1-703-679-1070
Their hours of operation are 6:00am - 9:00pm E.T. (Monday - Friday, excluding Federal holidays).
You may also contact the Call Center via email (EPACALLCENTER@epa.gov) or fax (703-674-1008).

Governmental Representatives

Contact a National or Regional EPA representative or a State, Local, or Tribal Agency representative

phone CDX

Central Data Exchange (CDX) is EPA's electronic reporting site.
CDX support is available toll-free between the hours of 8:00 am and 6:00 pm (EST) at 888-890-1995.

computer Contact Form

Use the form below to send us a comment or question. Privacy and Security Notice

EPA welcomes your comments, especially comments on how we can improve our Web site. We strive to respond to every comment with an answer or an appropriate referral as quickly as possible. Most comments will be responded to within 10 business days.

Please help us answer your request by including a correct e-mail address. We receive many messages that we can't respond to because of incorrect email addresses. Also, if you are referring to a specific page within EPA's web site, please include a URL or title for the site. If your browser doesn't support forms, you can e-mail your comment to Bonnie Johnson (johnson.bonnie@epa.gov).


Sending comments initiates electronic mail originated from a federal government computer system of the United States Environmental Protection Agency (EPA). Unauthorized access or use of this EPA system may subject violators to criminal, civil and/or administrative action. For official purposes, law enforcement and other authorized personnel may monitor, record, read, copy and disclose all information which an EPA system processes. Any person's access or use, authorized and unauthorized, of this EPA system to send electronic mail constitutes consent to these terms.

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