Friday, March 4, 2005:

March 4, 2005 - System Upgrade/Maintenance: The UCMR Flow will be unavaliable to all CDX Web UCMR users from 05:00 PM to Saturday, March 5, 2005 05:00 PM. This will not affect other CDX Web Flows or EPA Node exchanges using CDX.

Saturday, February 26, 2005:

February 26/27, 2005 - UCMR will be unavailable from 7:00am Saturday 2/26 to 7:00pm Sunday 2/27 due to Oracle upgrade activity.

Sunday, February 13, 2005:

February 13, 2005 - System Upgrade/Maintenance: The CDX web will be unavailable to all users from 08:00 PM to 11:00 PM. This will not affect the Exchange Network; however, EPA Node exchanges using CDX will be interrupted.

Sunday, December 5, 2004:

December 05, 2004 - GigaBit Switch Upgrade: The CDX Web and the Exchange Network will be unavailable to all users from 8:00 PM to 12:00 PM (EST).

Saturday, November 20, 2004:

November 20, 2004 - Database Version Upgrades: The CDX web will be unavailable to all users. This will not affect the Exchange Network; however, EPA Node exchanges using CDX will be interrupted.

Friday, November 19, 2004:

November 19, 2004 - Database Version Upgrades: The CDX web will be unavailable to all users from November 19, 2004 09:30 PM to November 20, 2004 01:00 AM. This will not affect the Exchange Network; however, EPA Node exchanges using CDX will be interrupted.

Friday, October 29, 2004:

October 29, 2004 - New CDX Node Service: New schema validation service for eDMR, FRS, AQS and RCRA flows is now available on the Central Data Exchange (CDX) Production system.

Friday, October 29, 2004:

October 29, 2004 - New AQS XML File Support: The Air Quality Subsystem (AQS) Submittal Form application is available for XML file upload and schema validation.