Generating Availability Data System (GADS)

The electric utility industry initiated GADS in 1982 to expand data collection activities that it began in 1963. Today, NERC’s GADS maintains operating histories on more than 5,000 generating units in the North America.

GADS is recognized as a valuable source of reliability information for total unit and major equipment groups and is widely used by industry analysts in a variety of applications. Through GADS, NERC collects information about the performance of electric generating equipment and provides assistance to those researching information on power plant outages. GADs also supports equipment availability analyses and other decision-making processes in the industry. GADS data is also used in conducting assessments of generation resources and improving their performance.
GADS is a mandatory industry program for conventional generating units that are 20 MW and larger. GADS is open to any organization that operates electric generating facilities and is willing to follow the GADS reporting requirements specified in the GADS Data Reporting Instructions (DRI).
For more information about GADS, please contact



 GADS News

GADS Wind Training: The dates for 2020 GADS Wind training are now available. GADS Wind training will include the reporting implementation timeline, entity registration, processes and reports.

For Registration Please click here : GADS Wind Training


GADS Wind Data Reporting Instructions Update: An addendum to the GADS Wind Data Reporting Instructions with additional data validations for Appendix J has been posted to the GADS Wind DRI Page

 Data Submission

 Deadlines for Data Submission:
  • GADS Conventional Reporting into WebE-GADS
  • GADS Wind for Wind Turbine Generation Data Reporting Plants with a Total Installed Capacity of 100 MW or Greater in 2019, and 75 MW in 2020.
  • February 15, for the prior year 
  • June 29, for Quarter 1, January 1 – March 31
  • August 15, for Quarter 2, April 1 – June 30
  • November 15, for Quarter 3, July 1 – September 30  
  • February 15, for Quarter 4, October 1 – December 31
  • When a deadline falls on a weekend, reporting will be extended through the following Monday.