Sunday, May 2, 2010:

Sunday, May 2, 2010 - 08:00 AM to 12:00 PM EST - The CDX Web and Exchange Network may experience intermittent delays in electronic mail delivery due to system maintenance.

Saturday, April 24, 2010:

Saturday, April 24, 2010 - 06:00 AM to 11:00 PM EST - CDX and the Exchange Network may experience intermittent outages due to hardware upgrades.

Saturday, April 17, 2010:

Saturday, April 17, 2010 - 06:00 AM to 11:00 PM EST - CDX and the Exchange Network may experience intermittent outages due to hardware upgrades.

Saturday, April 10, 2010:

Saturday, April 10, 2010 - 09:00 AM to 10:00 AM EST - CDX and the Exchange Network may experience intermittent outages due to hardware upgrades at the EPA National Computer Center (NCC) in Research Triangle Park.

Saturday, March 27, 2010:

Saturday, March 27, 2010 - 06:00 AM to 11:00 PM EST - CDX and the Exchange Network may experience intermittent outages due to hardware upgrades at the EPA National Computer Center (NCC) in Research Triangle Park.

Saturday, February 6, 2010:

Saturday, February 6, 2010 - 10:00 AM to 10:00 PM EST - Database Upgrades: The CDX Web and Exchange Network may experience intermittent outages due to database maintenance.

Saturday, December 19, 2009:

Saturday, December 19, 2009 - 10:00 AM to 10:00 PM EST - Database Upgrades: The CDX Web and Exchange Network may experience intermittent outages due to database maintenance.

Saturday, December 12, 2009:

Saturday, December 12, 2009 - 10:00 AM to 4:00 PM EST - Database Upgrades: The CDX Test environment will be unavailable due to database maintenance.