USFs were filled by 65% as of July 4, 2020.
Natural gas stocks in Ukraine's underground storage facilities (USFs) grew by 2.1%, to 20.15 billion cubic meters (bcm) within a week, June 28-July 4.
As of July 4, 2020, gas reserves in the country's USFs increased by 44.2% from 13.97 bcm as of July 4, 2019, the state-run gas transport system operator Ukrtransgaz said.
The USFs were filled by 65% as of July 4, 2020.
As UNIAN reported earlier, Ukraine started the season of pumping natural gas into its USFs on March 11, when the country's gas reserves there were 15.808 bcm.
By the start of the 2019-2020 heating season, Ukraine had accumulated 21.76 bcm of gas in its USFs, which was a record high figure in the past decade.