Natural Gas Stocks Injection in Slovakia increased to 43.99 GWh/d on Tuesday April 14 from 42.04 in the previous day. Natural Gas Stocks Injection in Slovakia averaged 86.87 GWh/d from 2011 until 2026, reaching an all time high of 378.61 GWh/d in May of 2019 and a record low of 0.00 GWh/d in January of 2011.