The U.S. Energy Information Administration’s (EIA) two metrics for assessing 2019 underground working natural gas storage capacity in the Lower 48 states compared with the previous year show mixed results: one metric reported a small increase and the other a small decrease.

EIA measures working natural gas storage capacity in two ways: design capacity and demonstrated peak capacity. In 2019, EIA estimates that maximum working natural gas storage capacity measured by design capacity was 4,693 billion cubic feet (Bcf) and was 4,261 Bcf measured by demonstrated peak capacity…