View History:    Monthly     Annual   
Download Data (XLS File)
Illinois Natural Gas Underground Storage Capacity (Million Cubic Feet)
Illinois Natural Gas Underground Storage Capacity (Million Cubic Feet)
Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
  2002 898,565 898,565 898,565 898,565 898,565 898,565 898,565 898,565 898,565 898,565 898,565 898,565
  2003 898,565 898,565 898,565 898,565 898,565 901,274 901,274 901,274 945,307 945,307 945,307 945,307
  2004 959,244 959,244 959,244 959,244 959,112 959,112 959,112 959,112 959,112 972,388 972,388 972,388
  2005 972,388 972,388 972,388 972,388 972,388 972,388 972,388 972,388 972,388 972,388 972,388 972,388
  2006 972,388 972,388 972,388 972,388 972,388 972,388 972,388 972,388 972,388 981,995 981,995 981,995
  2007 981,995 981,995 981,995 981,995 981,995 981,995 981,995 981,995 984,768 984,768 984,768 984,768
  2008 984,491 984,491 984,491 984,491 984,491 984,491 984,491 984,491 984,491 984,491 980,414 980,414
  2009 980,414 980,414 980,414 980,414 980,414 939,776 980,414 980,414 980,414 980,414 980,414 989,454
  2010 989,454 989,454 989,454 989,454 989,454 989,454 989,454 989,454 989,454 989,454 989,454 989,454
  2011 989,454 989,454 989,454 989,454 989,454 989,454 989,454 989,454 989,454 990,487 990,487 990,487
  2012 997,355 997,355 997,355 997,885 997,355 997,355 997,355 997,355 997,355 997,355 997,355 999,931
  2013 999,931 999,931 999,931 999,931 999,931 999,931 1,000,281 1,000,281 1,000,281 1,000,281 1,000,281 1,000,281
  2014 1,000,281 1,000,281 1,000,281 1,000,281 1,000,281 1,000,281 1,000,281 1,000,281 1,000,281 1,002,386 1,004,547 1,004,547
  2015 1,004,598 1,004,598 1,004,598 1,004,598 1,004,598 1,004,598 1,004,598 1,004,598 1,003,899 1,004,100 1,004,100 1,004,100
  2016 1,004,100 1,004,100 1,004,100 1,004,100 1,004,100 1,004,130 1,004,130 1,004,130 1,004,130 1,004,330 1,004,210 1,004,410
  2017 1,004,410 1,004,410 1,004,710 1,004,710 1,004,710 1,004,710 1,004,710 1,004,710 1,004,710 1,004,962 1,008,539 1,008,539
  2018 1,008,549 1,008,549 1,008,849 1,008,849 1,008,849 1,008,849 1,008,849 1,008,849 1,008,849 1,008,979 1,009,080 1,009,080
  2019 1,009,080 1,009,080 1,009,080 1,009,080 1,009,080 1,009,080 1,009,080 1,010,180 1,011,380 1,012,160 1,012,210 1,012,210
  2020 1,012,210 1,012,210 1,012,210 1,012,210 1,012,210 1,012,210 1,012,210 1,012,210 1,012,210 1,014,131 1,014,401 1,014,401
  2021 1,014,401 1,014,401 1,014,401 1,014,401 1,014,401 1,014,401 1,014,401 1,014,401 1,014,401 1,014,902 1,018,292 1,018,292
  2022 1,018,292 1,018,292 1,018,292 1,018,292 1,018,292 1,018,292 1,018,292 1,018,292 1,018,292 1,018,520 1,020,070 1,018,770
  2023 1,018,770 1,018,770 1,018,770 1,018,770 1,018,770 1,018,770 1,018,770 1,018,770 1,018,770 1,018,973 1,019,173 1,019,173
  2024 1,019,173 1,019,173 1,019,173 1,019,173 1,019,173 1,019,173 1,019,173 1,019,573 1,019,573 1,019,773 1,019,823 1,019,823
  2025 1,019,823 1,019,823 1,019,823 1,019,823 1,019,823 1,019,823 1,017,523

- = No Data Reported;  -- = Not Applicable;  NA = Not Available;  W = Withheld to avoid disclosure of individual company data.
Release Date: 9/30/2025
Next Release Date: 10/31/2025

Referring Pages: