Wednesday, November 14, 2012:

Saturday, December 1, 2012 - 6:00 AM to 12:00 PM ET - Database Patching: CDX and the Exchange Network may experience intermittent outages due to database maintenance.

Wednesday, November 14, 2012:

Saturday, November 17, 2012 - 8:00 AM to 2:00 PM ET - Database Patching: The CDX Pre-Production Environment may experience intermittent outages due to database maintenance.

Wednesday, October 17, 2012:

Saturday, October 20, 2012 - 9:00 AM to 12:00 PM ET - Network Maintenance: The CDX Pre-Production Environment may experience intermittent outages due to network maintenance.

Monday, October 1, 2012:

Monday, October 1, 2012: The Central Data Exchange Production upgrade has been completed.

Tuesday, September 25, 2012:

Saturday, September 29, 2012 - 1:00 PM ET to Sunday, September 30, 2012 - 11:59PM ET - Application Maintenance and Database Upgrades: The Central Data Exchange will be unavailable due to scheduled upgrades.

Tuesday, September 25, 2012:

Tuesday, September 25, 2012 - Connectivity has been fully restored across all CDX environments. All known issues related to the EPA firewall upgrade have been resolved.

Tuesday, September 18, 2012:

Saturday, September 8, 2012 - Ongoing - An EPA firewall upgrade has caused intermittent communication issues within the CDX and Exchange Network Production and Test environments. While most issues have been resolved, remaining connectivity issues are being treated as high priority and being actively addressed.

Friday, August 24, 2012:

Saturday, September 8, 2012 - 4:00 AM to 4:00 PM ET - Network Maintenance: The CDX Production environment and the Exchange Network may experience intermittent outages due to a firewall upgrade.

Thursday, August 9, 2012:

Friday, August 24, 2012 - 6:00 PM to Monday, August 27, 4:00 AM ET - Network Maintenance: The CDX Pre-Production Environment may experience intermittent outages due to network maintenance.

Wednesday, August 8, 2012:

Thursday, August 9, 2012 - 6:00 PM to Friday, August 24, 2012 - 8:00PM ET - Application Maintenance and Database Upgrades: Lead-Based Paint Firm Application and Lead Abatement Notifications will be unavailable due to scheduled upgrades.

Thursday, June 14, 2012:

Saturday, June 23, 2012 - 12:00 AM to 9:00 PM ET: The CDX Pre-Production Environment may experience intermittent outages due to electrical maintenance.

Thursday, June 14, 2012:

Saturday, June 23, 2012 - 12:00 AM to 9:00 PM ET: The CDX Pre-Production Environment may experience intermittent outages due to electrical maintenance.