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Natural Gas

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Oil and Gas County Code Master List

With Data for 2019   |  Release Date:  January 30, 2020   |  Next Release Date: January 2021

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The County Code Master List (CCML) provides the EIA standard county name spellings and codes for use in the Form EIA-23L, Annual Report of Domestic Oil and Natural Gas Reserves.

Oil and Gas County Code Master List 2019

Table of Counties in Major U.S. Shale Plays

More about the County Code Master List

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