Natural Gas Stocks Injection in Slovakia decreased to 89.75 GWh/d on Wednesday September 2 from 91.74 in the previous day. Natural Gas Stocks Injection in Slovakia averaged 87.21 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 GWh/d in January of 2011.