Natural Gas Stocks Injection in Poland increased to 170.01 GWh/d on Friday September 5 from 154.50 in the previous day. Natural Gas Stocks Injection in Poland averaged 52.67 GWh/d from 2011 until 2025, reaching an all time high of 1852.66 GWh/d in September of 2014 and a record low of 0.00 GWh/d in January of 2011.