All prices are in $U.S./MMBtu. Data are excerpted directly from NGI's Daily Gas Price Index except for the (1) South Texas Avg, which is a simple average of NGPL S. Tx, Tennessee S. Tx, and TETCO S. Tx, and Ehrenberg, which is taken from NGI's MidDay Alert. For more information on how we calculate our next-day and next-month price indexes, please refer to our Price Index Methodology, which is located here. NOTE: NGI's Mexico Gas Price Index plans to calculate our own Mexico spot prices in the same manner as we do for locations in the United States & Canada as soon as possible. For more information, or if you wish to participate in NGI's Mexico natural gas price survey, please contact Dexter Steis at +1-703-318-8848, or e-mail us at