Natural Gas Stocks Inventory in Poland increased to 21.03 TWh on Thursday June 4 from 20.94 in the previous day. Natural Gas Stocks Inventory in Poland averaged 22.34 TWh from 2011 until 2026, reaching an all time high of 37.40 TWh in October of 2023 and a record low of 0.00 TWh in February of 2014.