Natural Gas Stocks Injection in Poland decreased to 56.58 GWh/d on Sunday April 19 from 58.21 in the previous day. Natural Gas Stocks Injection in Poland averaged 51.42 GWh/d from 2011 until 2026, 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.