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|View History: Monthly Download Data (XLS File)                                 
|View History: Monthly                                                           
|View History: Monthly                                                           
|View History:                                                                   
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|Pennsylvania Natural Gas in Underground Storage (Base Gas)  (Million Cubic Feet)
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|Pennsylvania Natural Gas in Underground Storage (Base Gas)  (Million Cubic Feet)
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|Year                                                                                                                              | Jan     | Feb     | Mar     | Apr     | May     | Jun     | Jul     | Aug     | Sep     | Oct     | Nov     | Dec    
|--------------------------------------------------------------------------------------------------------------------------------- | ------- | ------- | ------- | ------- | ------- | ------- | ------- | ------- | ------- | ------- | ------- | -------
|1990                                                                                                                              | 352,686 | 352,686 | 352,686 | 351,920 | 352,686 | 352,686 | 353,407 | 353,407 | 353,407 | 353,407 | 359,236 | 358,860
|1991                                                                                                                              | 349,459 | 348,204 | 334,029 | 335,229 | 353,405 | 349,188 | 350,902 | 352,314 | 353,617 | 354,010 | 353,179 | 355,754
|1992                                                                                                                              | 358,198 | 353,313 | 347,361 | 341,498 | 344,318 | 347,751 | 357,498 | 358,432 | 359,300 | 359,504 | 359,321 | 362,275
|1993                                                                                                                              | 362,222 | 358,438 | 351,469 | 354,164 | 360,814 | 359,349 | 359,455 | 359,510 | 359,530 | 361,433 | 360,977 | 360,971
|1994                                                                                                                              | 360,026 | 357,906 | 358,611 | 360,128 | 361,229 | 361,294 | 361,339 | 361,335 | 361,335 | 361,335 | 361,238 | 362,038
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|1995                                                                                                                              | 357,538 | 357,538 | 357,538 | 356,900 | 357,006 | 356,909 | 357,848 | 357,895 | 357,967 | 357,994 | 357,994 | 358,094
|1996                                                                                                                              | 358,128 | 357,834 | 352,453 | 356,496 | 356,821 | 356,848 | 356,848 | 356,848 | 356,848 | 356,848 | 356,848 | 356,848
|1997                                                                                                                              | 356,848 | 356,848 | 356,792 | 356,390 | 356,968 | 357,018 | 356,975 | 357,028 | 357,028 | 357,028 | 357,028 | 357,228
|1998                                                                                                                              | 354,901 | 354,901 | 354,901 | 354,873 | 354,854 | 354,853 | 354,901 | 354,901 | 354,901 | 353,018 | 354,692 | 354,901
|1999                                                                                                                              | 354,424 | 354,171 | 354,143 | 354,110 | 354,039 | 353,982 | 353,980 | 353,978 | 353,985 | 353,981 | 354,128 | 354,220
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|2000                                                                                                                              | 353,915 | 353,915 | 353,814 | 352,706 | 352,642 | 352,588 | 352,618 | 352,608 | 352,314 | 352,310 | 352,367 | 352,304
|2001                                                                                                                              | 352,367 | 352,366 | 352,063 | 352,328 | 352,389 | 352,241 | 352,237 | 351,201 | 352,389 | 343,552 | 345,599 | 345,596
|2002                                                                                                                              | 345,594 | 345,477 | 344,837 | 345,108 | 345,126 | 344,097 | 341,898 | 342,083 | 341,916 | 341,916 | 341,917 | 342,119
|2003                                                                                                                              | 341,337 | 339,803 | 339,700 | 339,482 | 339,587 | 339,806 | 339,965 | 339,944 | 339,923 | 338,837 | 338,788 | 338,808
|2004                                                                                                                              | 337,502 | 337,427 | 337,409 | 337,124 | 337,181 | 337,182 | 337,182 | 337,182 | 337,182 | 337,182 | 337,294 | 337,011
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|2005                                                                                                                              | 334,671 | 334,671 | 334,011 | 333,982 | 333,998 | 334,010 | 334,011 | 334,011 | 334,011 | 334,011 | 334,011 | 334,011
|2006                                                                                                                              | 334,703 | 334,703 | 334,703 | 334,690 | 334,687 | 334,700 | 334,699 | 335,847 | 335,847 | 335,852 | 335,852 | 335,852
|2007                                                                                                                              | 337,394 | 337,472 | 341,812 | 341,835 | 340,496 | 340,135 | 340,137 | 340,137 | 340,137 | 340,137 | 340,137 | 340,137
|2008                                                                                                                              | 340,137 | 339,924 | 339,689 | 339,840 | 340,069 | 340,136 | 340,137 | 340,137 | 340,137 | 340,137 | 340,137 | 340,137
|2009                                                                                                                              | 340,137 | 340,093 | 340,076 | 345,819 | 345,825 | 345,824 | 345,827 | 345,827 | 345,827 | 345,827 | 345,827 | 345,827
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|2010                                                                                                                              | 345,827 | 345,827 | 345,827 | 345,768 | 345,766 | 345,795 | 345,813 | 345,827 | 345,827 | 345,827 | 345,827 | 345,803
|2011                                                                                                                              | 345,771 | 345,726 | 345,610 | 345,585 | 345,692 | 345,819 | 345,827 | 345,827 | 345,827 | 345,827 | 343,827 | 343,827
|2012                                                                                                                              | 343,827 | 343,827 | 343,827 | 343,827 | 343,818 | 343,826 | 343,827 | 343,827 | 343,827 | 343,827 | 343,827 | 342,697
|2013                                                                                                                              | 343,812 | 343,812 | 343,531 | 343,794 | 343,799 | 343,708 | 343,614 | 343,662 | 343,682 | 343,682 | 343,682 | 343,681
|2014                                                                                                                              | 343,290 | 343,015 | 342,103 | 342,739 | 342,691 | 343,269 | 343,312 | 343,645 | 343,681 | 343,680 | 343,680 | 343,519
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|2015                                                                                                                              | 341,006 | 340,718 | 340,737 | 340,903 | 341,189 | 341,421 | 343,961 | 343,965 | 343,975 | 344,161 | 343,997 | 343,965
|2016                                                                                                                              | 343,318 | 343,199 | 336,338 | 336,131 | 336,240 | 336,717 | 336,817 | 336,855 | 336,855 | 336,855 | 336,855 | 336,680
|2017                                                                                                                              | 336,432 | 336,265 | 336,093 | 335,810 | 336,809 | 335,550 | 335,550 | 335,552 | 335,552 | 335,552 | 335,367 | 335,327
|2018                                                                                                                              | 335,021 | 334,752 | 334,345 | 334,315 | 335,074 | 335,314 | 335,402 | 335,395 | 335,612 | 335,612 | 335,612 | 335,600
|2019                                                                                                                              | 335,253 | 335,019 | 334,686 | 334,799 | 334,943 | 335,051 | 334,891 | 335,503 | 335,503 | 335,510 | 335,510 | 335,509
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|2020                                                                                                                              | 335,475 | 335,251 | 335,110 | 335,116 | 335,487 | 335,616 | 335,849 | 336,066 | 336,160 | 336,160 | 336,160 | 336,159
|2021                                                                                                                              | 336,126 | 336,003 | 335,779 | 335,780 | 335,809 | 335,828 | 335,825 | 336,044 | 336,160 | 336,156 | 336,157 | 336,157
|2022                                                                                                                              | 336,114 | 336,059 | 335,789 | 335,789 | 335,833 | 335,759 | 335,672 | 335,917 | 336,307 | 336,756 | 336,817 | 336,804
|2023                                                                                                                              | 336,790 | 336,780 | 336,673 | 336,673 | 336,667 | 336,651 | 336,696 | 336,779 | 336,779 | 336,779 | 336,779 | 336,779
|2024                                                                                                                              | 336,776 | 336,747 | 336,751 | 336,720 | 336,710 |         |         |         |         |         |         |        
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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