Thanksgiving Holiday Closure

The Railroad Commission of Texas will close at noon, Wednesday, November 26 and remain closed on Thursday, November 27 and Friday, November 28 in observance of the Thanksgiving Holiday. The agency will reopen for regular business at 8 a.m. on Monday, December 1.

Groundwater Advisory Unit


Effective December 16, 2013, the Surcharge listed in Statewide Rule 78 will apply to the Groundwater Advisory Unit (GAU) Expedite Fee.  The basic Expedite Fee is $75. The 150 percent surcharge is $112.50. The GAU Expedite Fee with Surcharge is a total of $187.50.

The GAU provides tthree types of letters of groundwater determination letters.

Groundwater Protection Determination

  • This type of groundwater protection determination letter, where possible, provides top and bottom of fresh water [less than 1,000 mg/L total dissolved solids (TDS)] and
  • Base of usable-quality groundwater (3,000 mg/L TDS and other waters known to be used or identified as sources of desalinization water).
  • This type of groundwater protection determination is used for new drills, cathodic protection, re-entry, well integrity test, microseismic boreholes, injection into a producing zone, plug and abandon,  and conversion of an oil and gas well to a water well.

Groundwater Protection Determination for Saltwater Disposal Wells

  • This type of groundwater protection determination letter provides the base of the underground source of drinking water (less than 10,000 mg/L TDS) and
  • Verifies geologic isolation from the base of usable-quality groundwater.

Groundwater Protection Determination for Seismic Survey

  • This type of groundwater protection determination letter provides a range of depths for the base of usable-quality groundwater across the seismic survey.

Last Updated: 11/4/2014 4:18:05 PM