Hourly Load Data Archives

Find historical information on hourly loads by ERCOT control area for the years 1995-2006. Data is not available for the years 2001-2002.

Information may vary from report to report. Since April 2003, ERCOT reported on load data in its eight weather zones; prior to April 2003, ERCOT was divided into 11 control areas, and the load data was reported accordingly.

View current data in Historical Load by Load Area (new browser window will be launched).

2008 ERCOT Hourly Load Data
June 04, 2008
(06/04/08, .xls, 432 KB)
2007 ERCOT Hourly Load Data
January 01, 2008
(02/12/08, .xls, 979 KB)
2006 ERCOT Hourly Load Data
December 28, 2006
(01/02/07, .xls, 1004.5 KB)
2005 ERCOT Hourly Load Data
January 01, 2006
(11/17/06, .zip, 323.3 KB)
2004 ERCOT Hourly Load Data
January 01, 2005
(11/17/06, .zip, 323 KB)
2003 ERCOT Hourly Load Data
January 01, 2004
(11/17/06, .zip, 230.3 KB)
2000 ERCOT Hourly Load Data
December 31, 2000
(11/10/05, .zip, 372.5 KB)
1999 ERCOT Hourly Load Data
December 31, 1999
(12/11/02, .zip, 372.1 KB)
1998 ERCOT Hourly Load Data
December 31, 1998
(12/11/02, .zip, 1 MB)
1997 ERCOT Hourly Load Data
December 31, 1997
(12/11/02, .zip, 206.6 KB)
1997 ERCOT Hourly Load Data
December 31, 1997
(07/26/04, .xls, 106.5 KB)
1997 ERCOT Hourly Load Data (Raw)
December 31, 1997
(07/26/04, .txt, 58.5 KB)
1996 ERCOT Hourly Load Data
December 31, 1996
(07/26/04, .txt, 209 KB)
1995 ERCOT Hourly Load Data
December 31, 1995
(07/26/04, .txt, 58.5 KB)