Texas:
W-10:
historical annuals 1978 - 2001 (very thin data set)
monthlies Aug 2002 - present
G-10:
historical annuals May 1976 - Dec 2002 [April 1991 "unavailable"]
monthlies Jan 2003 - present
Well Database:
26 month trailing from August 2002
Louisiana:
All well test data from the Louisiana Department of Natural Resources database. (approximately 1978 - present)