How full are Germany’s gas storage facilities?

Storage levels are a snapshot

Gas storage is part of an ongoing supply system. While gas is withdrawn, pipelines and LNG terminals continue delivering gas to the grid. Demand fluctuates: a cold week places different demands on supply than a mild one, and industry and power stations also need gas.

Storage levels alone cannot tell us how long supplies will last. Dividing inventory by average daily consumption would conceal assumptions about future demand and further deliveries. Read inventories, changes and inflows together. Germany’s Federal Network Agency also assesses supply through this combination.

Inventory and deliverability belong together

Two stores can contain the same amount of gas yet deliver it at different rates. Inventory is the stored energy quantity. Withdrawal capacity is the quantity that can be delivered within a specified time.

The monitor uses different units: terawatt-hours (TWh) for inventory and gigawatt-hours per day (GWh/day) for daily gas flows. A large inventory alone tells us little about how much a facility can contribute at short notice.

Facility characteristics also matter. Operators publish, for example, performance curves that depend on filling levels. A published maximum rate is not a guarantee for every operating condition.

Different storage types operate underground

Porous storage uses spaces within rock, often former natural gas or oil fields. Gas spreads through fine pores. Cavern storage uses artificial cavities in salt formations. Geology and equipment shape how a facility can be used.

Harsefeld cavern storage illustrates short-term flexibility: its operator explicitly highlights high injection and withdrawal rates for balancing peak consumption.

When reading the data, consider size, storage type and output alongside filling levels. A lower percentage becomes meaningful only when these characteristics are considered.

The calendar changes what a number means

A given filling level in spring has a different meaning from the same level just before winter. Storage balances seasonal and weather-driven demand changes. Comparisons should therefore use the same point in the year wherever possible.

The previous-year curve and five-year range provide context. They show observations on comparable days, not a required minimum for the future.

Europe’s supply system is also changing. The European Commission documents, for example, LNG’s growing role in the import mix. Historical storage levels should therefore be read alongside today’s delivery routes and demand.

What the 80% line means

Germany’s storage filling regulation generally requires 80% per facility on 1 November. Bad Lauchstädt, Frankenthal, Hähnlein, Rehden, Stockstadt and Uelsen require 45%. On 1 February the general requirement is 30%; Bierwang, Breitbrunn, Inzenham-West and Wolfersberg require 40%. The regulation expires on 31 March 2027.

The 80% line in Germany’s chart references the November requirement for individual facilities. It is not a blanket statutory target for Germany’s total filling level. Compliance must be checked for the affected facilities.

The EU has different rules: its 90% baseline target applies to Member States’ relevant aggregate storage capacity and can be reached between 1 October and 1 December. Statutory flexibilities may also apply.

On 9 April 2026, the Commission reaffirmed its recommendation for the 2026 filling season to use existing flexibilities and consider reducing the target to 80% early in the season. This does not establish that any particular Member State has already applied a reduction. Distinguish the 90% baseline from a permissible deviation.

Storage levels put gas purchasing into context

Storage data help track market conditions but do not identify a reliable buying time. Prices also depend on demand, weather, supply developments and the international LNG market. Commission gas market reports therefore consider several drivers together.

For a purchasing decision, combine the market overview with your consumption, delivery period and offer terms. Check which price components a price guarantee actually covers: its duration and scope may be limited.

The monitor supports preparation. It does not justify a conclusion such as “storage is well filled, so gas will get cheaper”.