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|View History: Monthly Download Data (XLS File)                                  
|View History: Monthly                                                            
|View History: Monthly                                                            
|View History:                                                                    
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|Washington Natural Gas in Underground Storage (Working Gas)  (Million Cubic Feet)
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|Washington 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   
|--------------------------------------------------------------------------------------------------------------------------------- | ------ | ------ | ------ | ------ | ------ | ------ | ------ | ------ | ------ | ------ | ------ | ------
|1990                                                                                                                              | 8,882  | 5,257  | 3,304  | 2,365  | 1,893  | 5,005  | 7,942  | 10,880 | 11,949 | 12,154 | 12,235 | 9,008 
|1991                                                                                                                              | 6,557  | 6,453  | 3,509  | 6,342  | 7,864  | 10,580 | 12,718 | 12,657 | 12,652 | 14,112 | 15,152 | 14,694
|1992                                                                                                                              | 12,765 | 9,785  | 9,204  | 8,327  | 9,679  | 10,854 | 11,879 | 13,337 | 14,533 | 13,974 | 13,312 | 9,515 
|1993                                                                                                                              | 6,075  | 2,729  | 3,958  | 4,961  | 9,491  | 10,357 | 12,505 | 13,125 | 15,508 | 13,348 | 9,567  | 11,274
|1994                                                                                                                              | 9,672  | 5,199  | 4,765  | 6,867  | 9,471  | 11,236 | 13,045 | 13,496 | 14,629 | 14,846 | 14,458 | 12,884
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|1995                                                                                                                              | 10,750 | 8,520  | 8,267  | 8,500  | 11,070 | 12,622 | 14,035 | 13,764 | 16,258 | 16,158 | 16,224 | 12,869
|1996                                                                                                                              | 6,547  | 5,488  | 4,672  | 4,780  | 6,742  | 10,060 | 11,344 | 15,100 | 14,244 | 12,391 | 11,634 | 9,724 
|1997                                                                                                                              | 8,241  | 6,443  | 3,207  | 3,273  | 9,152  | 12,918 | 13,529 | 12,538 | 14,805 | 14,098 | 14,008 | 10,831
|1998                                                                                                                              | 10,759 | 6,611  | 3,282  | 1,713  | 5,645  | 8,596  | 8,908  | 12,547 | 14,369 | 13,664 | 14,424 | 11,198
|1999                                                                                                                              | 10,595 | 8,348  | 6,940  | 4,987  | 5,544  | 7,001  | 10,528 | 17,065 | 17,065 | 17,485 | 17,192 | 15,508
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|2000                                                                                                                              | 8,301  | 6,253  | 4,729  | 5,622  | 8,190  | 11,850 | 15,589 | 14,799 | 17,632 | 16,260 | 12,451 | 14,414
|2001                                                                                                                              | 11,804 | 5,660  | 5,071  | 7,337  | 15,603 | 15,790 | 15,419 | 16,747 | 18,181 | 17,226 | 17,067 | 17,083
|2002                                                                                                                              | 10,031 | 5,820  | 4,943  | 8,751  | 12,783 | 15,680 | 16,287 | 17,456 | 18,541 | 16,759 | 17,997 | 16,800
|2003                                                                                                                              | 13,521 | 5,964  | 6,523  | 6,909  | 11,794 | 14,131 | 14,899 | 17,791 | 19,681 | 18,364 | 18,141 | 17,583
|2004                                                                                                                              | 14,720 | 9,565  | 10,543 | 13,533 | 17,571 | 17,294 | 16,145 | 18,094 | 20,565 | 18,772 | 19,192 | 19,506
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|2005                                                                                                                              | 14,594 | 11,884 | 13,597 | 15,465 | 19,335 | 19,536 | 18,642 | 19,142 | 20,739 | 20,186 | 19,757 | 19,567
|2006                                                                                                                              | 16,956 | 11,601 | 11,832 | 11,744 | 15,682 | 18,716 | 18,390 | 20,579 | 21,917 | 19,646 | 17,896 | 17,988
|2007                                                                                                                              | 11,632 | 9,234  | 9,398  | 10,075 | 14,604 | 17,215 | 19,915 | 19,655 | 22,074 | 21,479 | 19,089 | 18,639
|2008                                                                                                                              | 10,891 | 7,702  | 4,282  | 5,490  | 11,346 | 15,274 | 20,011 | 20,659 | 22,339 | 22,366 | 21,753 | 17,535
|2009                                                                                                                              | 13,941 | 9,868  | 7,357  | 12,680 | 18,285 | 21,457 | 22,068 | 22,139 | 23,084 | 22,793 | 22,733 | 17,634
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|2010                                                                                                                              | 16,461 | 12,014 | 9,668  | 11,566 | 18,191 | 22,263 | 22,145 | 21,819 | 23,490 | 23,455 | 20,196 | 19,415
|2011                                                                                                                              | 15,798 | 9,493  | 7,768  | 6,696  | 11,196 | 14,867 | 16,635 | 20,508 | 22,923 | 22,818 | 22,549 | 21,513
|2012                                                                                                                              | 15,089 | 10,301 | 11,039 | 12,876 | 17,284 | 21,249 | 21,346 | 21,826 | 23,607 | 23,237 | 22,978 | 20,719
|2013                                                                                                                              | 12,619 | 9,660  | 8,779  | 8,112  | 11,487 | 15,411 | 18,533 | 21,321 | 23,059 | 22,868 | 21,206 | 17,986
|2014                                                                                                                              | 13,764 | 8,477  | 5,805  | 7,894  | 12,925 | 16,369 | 17,898 | 21,975 | 23,500 | 23,731 | 22,176 | 21,499
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|2015                                                                                                                              | 17,084 | 12,372 | 9,852  | 11,051 | 15,388 | 15,225 | 14,948 | 19,694 | 22,753 | 23,577 | 19,790 | 17,080
|2016                                                                                                                              | 15,600 | 9,746  | 7,811  | 10,729 | 15,121 | 16,955 | 17,743 | 19,833 | 23,100 | 23,208 | 22,761 | 19,296
|2017                                                                                                                              | 12,387 | 8,365  | 6,810  | 9,405  | 15,029 | 17,768 | 17,438 | 19,663 | 23,308 | 22,105 | 22,276 | 18,224
|2018                                                                                                                              | 15,328 | 8,566  | 6,361  | 8,906  | 13,468 | 19,139 | 17,285 | 19,917 | 22,399 | 22,396 | 21,003 | 19,305
|2019                                                                                                                              | 13,631 | 7,763  | 10,098 | 14,196 | 20,998 | 22,298 | 21,322 | 20,154 | 22,980 | 19,911 | 20,723 | 19,961
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|2020                                                                                                                              | 17,291 | 9,566  | 8,516  | 12,975 | 19,942 | 22,654 | 21,961 | 22,260 | 23,534 | 21,514 | 21,192 | 19,248
|2021                                                                                                                              | 17,962 | 11,171 | 8,740  | 9,835  | 19,747 | 21,946 | 22,926 | 21,392 | 22,649 | 22,770 | 23,102 | 17,947
|2022                                                                                                                              | 17,923 | 10,544 | 9,889  | 7,429  | 12,786 | 19,181 | 21,383 | 19,820 | 22,988 | 22,000 | 19,296 | 15,071
|2023                                                                                                                              | 12,805 | 8,710  | 5,462  | 8,139  | 18,088 | 22,028 | 19,698 | 22,106 | 22,873 | 20,204 | 20,516 | 21,746
|2024                                                                                                                              | 17,302 | 13,634 |        |        |        |        |        |        |        |        |        |       
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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: 4/30/2024                                                                                                          
|Next Release Date: 5/31/2024