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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 7,700 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


January 19, 2018: New GADS Wind Subgroup Template has been posted on the GADS Wind Data Reporting page.

The Reference tab now includes detailed validation information by field. No changes have been made to the Sub-Group tab.

Deadlines for Data Submission Into WebE-GADS Are:

  • February 15, for the prior year 
  • May 15, 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  

In 2018, Deadlines for Data Submission into GADS Wind for Wind Turbine Generation Data Reporting Plants with a Total Installed Capacity of 200 MW or Larger Are: 

  • May 15, 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  

Training: In 2018, GADS conventional and wind in person training will be offered. More information can be found under the Key Link for Training.  


 Program Contacts


 Key Links


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