An official website of the United States government.

Due to a lapse in appropriations, EPA websites will not be regularly updated. In the event of an environmental emergency imminently threatening the safety of human life or where necessary to protect certain property, the EPA website will be updated with appropriate information. Please note that all information on the EPA website may not be up to date, and transactions and inquiries submitted to the EPA website may not be processed or responded to until appropriations are enacted.

We've made some changes to EPA.gov. If the information you are looking for is not here, you may be able to find it on the EPA Web Archive or the January 19, 2017 Web Snapshot.

AQS Relelase Notes December 3, 2018

  • The AQS Team has fixed a bug that prevented monitors from being selected for NPAP audit this year (2018) if they had been selected for NPAP Audit in 2017. Now each monitor can be selected for audit regardless of whether it was selected for audit in the previous year.
  • The AQS Team has updated the AQS Regional Contact List
  • The AQS Team has removed the inactive records from the code tables for geographic queries. These queries were modified to remove non-active locations.