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 .

2010 ERCOT Hourly Load Data
July 13, 2010
(07/14/10, .xls, 876 KB)
2009 ERCOT Hourly Load Data
January 01, 2009
(07/14/10, .xls, 1.7 MB)
2008 ERCOT Hourly Load Data
November 24, 2008
(07/14/10, .xls, 1.7 MB)
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)