As of September 14, 2025, the volume of natural gas in Ukraine's underground storage facilities has for the first time this year surpassed last year's figures, reaching 12.055 billion cubic meters.

This was reported by the specialized publication ExPro.

On September 14, 2025, Ukraine's underground storage contained 12.055 billion cubic meters of gas, while the same date in 2024 recorded 12.05 billion cubic meters, which is 0.05% or nearly 5 million cubic meters less.

It is expected that this gap will increase in the coming days.

The publication notes that at the beginning of this year's injection season (April 17), Ukraine's underground storage facilities held approximately 5.41 billion cubic meters of natural gas, which is 35% or 2.95 billion cubic meters less than on April 17, 2024. Throughout the injection season, Ukraine has managed to completely close this gap primarily through increased imports.

Since the beginning of the injection season, nearly 6.68 billion cubic meters of gas have been injected into Ukraine's underground storage, which is 1.67 times more than in 2024. Additionally, in 2025, more gas has been injected into the storage than was available at the end of the heating season.

In particular, in September 2025, Ukraine is injecting an average of 53.9 million cubic meters of natural gas into storage daily, which is 2.3 times more than in September 2024. About half of this volume consists of imported resources.

The average daily import volume in September is 23.6 million cubic meters, almost entirely supplied by the state-owned company Naftogaz of Ukraine.

It is worth noting that the filling level of European underground gas storage on September 13-14 reached 80% (86 billion cubic meters of natural gas). This is the lowest filling level in the EU since the onset of the full-scale Russian invasion of Ukraine, but this year's reserves are higher than in 2021.