The State of Texas, via the regulating authority, the Railroad Commission of Texas (RCT), makes it difficult, deliberately, to determine how much natural gas is being flared.
Technically, flaring of natural gas is allowed on a well intermittently, during drilling, and for only 10-days after a well is completed, for flow testing. Unfortunately, a variety of loopholes and exceptions in the laws allow flaring to occur indefinitely.
The following graph, produced by RCT, to deliberately obfuscate and diminish the flaring activity shows that in recent years, about 1% of all of the produced gas (which includes casing-head gas, and well gas). On a monthly based, in recent years, the wells state-wide produced about 650-billion (650,000,000,000) cubic feet of natural gas. Flaring 1% of that gas amounts to 6.5-billion (6,500,000,000) feet – flared, burned off, which creates carbon dioxide, nitrous oxide, and various volatile organic compounds, all of which pollute the air, contaminate the ground, and surface water, and increase the atmospheric CO2 load.
Converted to electrical power, that 6.5-billion cubic feet of natural gas, wasted through flaring, would generate 1905 gigawatt hours (Gwh) of electricity monthly. For comparative purposes, factoring in peak and trough demand, 1Gwh is enough energy to supply approximately 300,000 average U.S. homes. Just in Texas, every month, more than 19-times this amount of energy is wasted through flaring.
You can see for yourself what the RCT’s flaring policies are here: