How full is European gas storage right now?: As of 9 April 2026, EU gas storage stood at 28.92% full (327 TWh) according to GIE AGSI+, the lowest level at this point in the year since 2018 and 6-20 percentage points below the five-year average.Source: GIE AGSI+
What is GIE AGSI+ and how do I read it?: GIE AGSI+ is the Gas Infrastructure Europe platform that publishes daily EU underground gas storage levels by country. It is the official data source for EU storage regulation and is freely accessible online.
Why is European gas storage so low in spring 2026?: EU storage entered 2026 already below seasonal norms after a cold winter, then faced additional pressure from the Qatar Force majeure following the Ras Laffan LNG facility strikes. AGSI+ recorded the lowest seasonal level since 2018 by April 2026.Source: GIE AGSI+
What storage level does Europe need to reach before winter?: EU regulations previously required 90% storage by 1 November. In April 2026 the Commission reduced this to 80%, with flexibility to 70% in exceptional circumstances, citing the AGSI+ data showing the refill challenge.Source: European Commission
What is GIE AGSI+ and how do I read the EU gas storage data?: GIE AGSI+ is the Gas Infrastructure Europe Aggregated Gas Storage Inventory, a daily public platform tracking EU gas storage fill levels across 28 countries. It shows percentage fill, TWh stored, and injection or withdrawal rates by country and aggregate.Source: Gas Infrastructure Europe
What pace does EU gas storage need to reach 80% by November 2026?: The EU needs to inject at least 0.257 percentage points per day from 2 May to reach 80% by 1 November 2026. The observed pace as of 2 May was 0.21 pp/day, a 0.045 pp/day shortfall against the floor.Source: GIE AGSI+ / Lowdown calculation
How often does AGSI+ update EU gas storage figures?: GIE AGSI+ publishes daily injection and withdrawal data and stock levels, typically reflecting the previous day's data.Source: Gas Infrastructure Europe
Why does EU storage pace matter more than the percentage level?: With 183 days to the 1 November target, a 0.045 pp/day shortfall projects a November landing of 72-73% rather than 80%. The absolute level can look reassuring while the pace runs below the required floor.Source: Lowdown analysis / GIE AGSI+
What is EU gas storage fill level in May 2026?: EU aggregate storage reached 36.3% on 17 May 2026, an 18.7 pp deficit below the five-year seasonal norm of 55%.Source: GIE AGSI+
How fast is Europe injecting gas into storage in 2026?: The EU injected gas at 0.18 pp/day in the week to 17 May 2026, versus the 0.53 pp/day needed to reach the 80% November target.Source: GIE AGSI+
Will Europe hit the 80% gas storage target by November 2026?: At the current injection pace of 0.18 pp/day, the EU would land around 66-68% by 1 November, well short of the 80% target.Source: GIE AGSI+ analysis
What does AGSI+ stand for and who runs it?: AGSI+ stands for Aggregated Gas Storage Inventory and is operated by Gas Infrastructure Europe, a Brussels-based trade association.Source: Gas Infrastructure Europe
What is EU gas storage level today and is it on track for winter?: AGSI+ showed EU storage at 38.21% on 24 May 2026, well below the 55% five-year seasonal norm. The injection pace of 0.38 pp/day is still below the 0.53 pp/day needed to hit 80% by 1 November, and the acceleration is driven by state mandates rather than commercial activity.Source: Update 12 event 3636
Why is EU gas storage injection pace doubling but still not enough?: The pace doubled to ~0.38 pp/day in late May 2026 because state mandates in the Netherlands, France, and Italy directed injection regardless of price. But 0.38 pp/day is still below the required 0.53 pp/day, and mandate-driven injection is fragile — it collapses if TTF falls below the policy cover threshold.Source: Update 12 event 3636
What is GIE AGSI+ and who produces it?: GIE AGSI+ (Aggregated Gas Storage Inventory) is the EU's primary gas storage transparency platform, operated by Gas Infrastructure Europe in Brussels. It publishes daily injection, withdrawal, and stock levels from 28 European countries, and is the source of record for Commission regulations and ENTSOG seasonal outlooks.Source: background
What was the lowest EU gas storage level recorded in 2026?: AGSI+ recorded EU storage at 28.92% (327 TWh) on 9 April 2026, the lowest seasonal reading since 2018, which directly prompted the European Commission to revise its mandatory fill target from 90% to 80%.Source: Update 1 event

Background

AGSI+ recorded EU aggregate storage at 38.21% on 24 May 2026, with the injection pace having doubled to approximately 0.38 pp/day over 23-24 May from the 0.17 pp/day recorded a week earlier. The acceleration is driven by state mandates — Dutch EBN (trebled to 80 TWh), French CRE, and Italian ARERA regulated demand — not commercial arbitrage: the TTF summer-winter strip remained inverted throughout, eliminating the spread incentive for commercial operators. Mandate-driven injection is structurally weaker than commercially-driven injection because it unwinds the moment TTF slips below the policy cover threshold.

GIE AGSI+ (Aggregated Gas Storage Inventory) is operated by Gas Infrastructure Europe, the Brussels-based trade association for European gas infrastructure operators, and aggregates daily injection and withdrawal data from 28 European countries. Its readings are the source of record for EU storage levels in Commission regulations, ENTSOG seasonal outlooks, and wholesale pricing. The April 2026 low of 28.92% (9 April) was the lowest seasonal reading since 2018 and directly triggered the Commission's revision of the mandatory fill target from 90% to 80%. The five-year seasonal norm sits at approximately 55% in mid-May, placing the current reading 16-17 pp below the seasonal average.

The platform's significance for market participants lies in the pace signal, not just the headline level. The AGSI+ print is the single figure that determines whether the EU is tracking towards its winter supply security floor. At the required pace of 0.53 pp/day to reach 80% by 1 November across 157 remaining days from 24 May, the current mandate-driven 0.38 pp/day remains well below the floor; a TTF dip that breaks mandate cover would expose the gap immediately. AGSI+ data is also the input to Bruegel's EUR 26-44bn refill cost range and ACER's seasonal supply outlook.

Source Material

Gas Infrastructure Europe GIE AGSI+ — EU Gas Storage Platform

How the World Sees Them

Germany

Berlin declined to introduce a summer injection-incentive scheme; German operators inject commercially into an inverted strip, making the German leg the one most sensitive to a TTF dip.

Energy traders

AGSI+ is the number the market watches daily; a doubled pace sounds bullish but mandate-funded injections do not persist through a spread-compression event.

EU policymakers

The doubled injection pace is mandate-driven, not market-driven; it is structurally fragile and unwinds the moment TTF drops below the policy cover threshold, leaving the 80% target exposed.

Southern Europe

Spain and Italy clear gas at lower prices and face less direct injection pressure, but monitor AGSI+ as the principal signal for whether winter continental supply will tighten.