The United States Strategic Petroleum Reserve, or SPR, has fallen to approximately 298.7 million barrels, its lowest level since January 1983. Inventories declined by around 6.1 million barrels during the latest reporting week, pushing the emergency stockpile below the symbolic threshold of 300 million barrels. The decline is part of the continuing release of crude oil from US strategic reserves following major disruptions to global energy markets associated with the conflict involving Iran and problems affecting supplies through the Strait of Hormuz.
In March 2026, President Donald Trump authorised the release of 172 million barrels of crude oil from the SPR. The decision formed part of a coordinated action by the 32 member countries of the International Energy Agency to release a record 400 million barrels of oil and petroleum products onto global markets. The US contribution represented the largest share of the coordinated release and was expected to take approximately 120 days to deliver because of technical limitations on how quickly crude can be withdrawn from the storage facilities.
Before the large 2026 drawdown began, the US strategic reserve held approximately 415 million barrels. This means inventories have declined by more than 100 million barrels within several months. By mid-July, the reserve had already fallen to around 316.5 million barrels, then its lowest level since 1983. Continued withdrawals subsequently pushed the stockpile below 300 million barrels.
The Strategic Petroleum Reserve was created following the 1973–1974 oil crisis to provide the United States with an emergency supply of crude oil in the event of major disruptions. The oil is stored in enormous underground salt caverns along the US Gulf Coast. The reserve is not intended to permanently replace domestic production or oil imports but to provide additional supplies during wars, natural disasters and other severe disruptions to energy markets.
The current level of approximately 298.7 million barrels is considerably below the volumes maintained during much of the past several decades. At the end of 2018, for example, the reserve contained approximately 649 million barrels. A major reduction occurred in 2022, when the Biden administration released large quantities of crude following Russia’s invasion of Ukraine and the resulting pressure on global energy markets. Some of those barrels were subsequently replaced, but the large coordinated release in 2026 has once again reversed the direction of the reserve.
Falling below 300 million barrels does not mean that the United States has effectively run out of strategic oil. The remaining volume still represents a substantial emergency stockpile, while the country is also one of the world’s largest producers of crude oil. The lower inventory does, however, reduce the additional buffer available to the federal government if another major disruption to global supplies occurs.
The situation also raises the question of when and how quickly Washington will begin rebuilding the reserve. When the coordinated release was announced in March, US Energy Secretary Chris Wright said the administration intended to replace the barrels withdrawn from the SPR and outlined plans for roughly 200 million barrels to be returned within the following year. Whether that timetable can be achieved will depend on market conditions, oil prices, infrastructure and future decisions by the US government.
For now, the central fact is that the US Strategic Petroleum Reserve has fallen to approximately 298.7 million barrels, its lowest level in more than four decades. The figure reflects the scale of the emergency releases made during the 2026 energy disruption while leaving the United States with a substantially smaller strategic buffer than it held for much of its recent history.
