USFs were filled by 80% as of December 19, 2020.
Natural gas stocks in Ukraine's underground storage facilities (USFs) shrank by 2%, to 24.7 billion cubic meters (bcm) within a week, December 13-19.
As of December 19, 2020, gas reserves in the country's USFs increased by 27% from 19.4 bcm as of December 19, 2019, the state-run gas transport system operator Ukrtransgaz said.
The USFs were filled by 80% as of December 19, 2020.
Background
Ukraine started pumping natural gas into its USFs on March 11 as the country's reserves stood 15.808 bcm.
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By the start of the 2019-2020 heating season, Ukraine had accumulated 21.76 bcm of gas, which was a record high over the past decade.