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|View History: Monthly Download Data (XLS File)                                       
|View History: Monthly                                                                 
|View History: Monthly                                                                 
|View History:                                                                         
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|Mountain Region Natural Gas in Underground Storage (Working Gas)  (Million Cubic Feet)
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|Mountain Region Natural Gas in Underground Storage (Working Gas)  (Million Cubic Feet)
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|Year                                                                                                                              | Jan     | Feb     | Mar     | Apr     | May     | Jun     | Jul     | Aug     | Sep     | Oct     | Nov     | Dec    
|--------------------------------------------------------------------------------------------------------------------------------- | ------- | ------- | ------- | ------- | ------- | ------- | ------- | ------- | ------- | ------- | ------- | -------
|2013                                                                                                                              | 170,239 | 144,706 | 129,036 | 124,639 | 134,489 | 147,902 | 162,115 | 182,104 | 201,048 | 214,044 | 209,600 | 173,398
|2014                                                                                                                              | 137,378 | 102,507 | 83,983  | 82,058  | 98,717  | 121,623 | 140,461 | 157,716 | 174,610 | 187,375 | 174,783 | 151,841
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|2015                                                                                                                              | 130,966 | 115,882 | 113,341 | 116,132 | 135,193 | 154,611 | 171,815 | 187,116 | 203,226 | 214,692 | 207,323 | 185,729
|2016                                                                                                                              | 155,618 | 143,129 | 144,056 | 151,738 | 176,251 | 196,013 | 207,988 | 218,798 | 232,217 | 248,109 | 251,253 | 204,436
|2017                                                                                                                              | 159,200 | 140,525 | 141,654 | 151,003 | 166,701 | 183,841 | 197,392 | 201,682 | 218,381 | 220,620 | 220,640 | 176,931
|2018                                                                                                                              | 135,051 | 100,727 | 86,992  | 91,148  | 119,907 | 139,990 | 148,052 | 163,475 | 179,384 | 183,091 | 167,887 | 141,460
|2019                                                                                                                              | 103,471 | 73,132  | 63,339  | 76,438  | 101,820 | 135,140 | 158,783 | 177,921 | 200,486 | 206,239 | 196,303 | 167,400
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|2020                                                                                                                              | 134,997 | 99,387  | 91,873  | 109,496 | 143,384 | 177,055 | 200,209 | 214,782 | 235,094 | 239,428 | 236,362 | 195,131
|2021                                                                                                                              | 154,862 | 115,106 | 113,427 | 123,884 | 154,829 | 175,062 | 184,546 | 190,407 | 205,222 | 213,318 | 204,403 | 171,282
|2022                                                                                                                              | 127,863 | 92,823  | 90,371  | 92,991  | 116,554 | 137,013 | 147,446 | 159,456 | 184,277 | 206,033 | 194,335 | 157,533
|2023                                                                                                                              | 122,780 | 93,683  | 79,253  | 98,121  | 136,361 | 171,486 | 192,156 | 216,449 | 239,483 | 251,867 | 246,535 | 227,577
|2024                                                                                                                              | 185,016 | 168,740 | 167,813 | 187,052 | 215,500 |         |         |         |         |         |         |        
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|- = No Data Reported;  -- = Not Applicable;  NA = Not Available;  W = Withheld to avoid disclosure of individual company data.
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|Release Date: 7/31/2024                                                                                                          
|Next Release Date: 8/30/2024