The United States produces more crude oil than any country in history, pumping more than 13.5 million barrels per day. On paper, that suggests a high level of energy security.
But energy security for different states depends on infrastructure and access. For the 39 million residents of California, independence is largely geographic fiction.
If the Strait of Hormuz remains constrained, attention will focus on Asia’s large crude importers. Yet a close look at U.S. pipeline maps and refinery configurations shows that California is uniquely exposed as well.
This is not a new concern. In my 2019 Forbes column, “California’s Oil Hypocrisy Presents a National Security Risk,” I detailed how the state’s declining production and lack of pipeline connectivity left it dependent on crude that transits the Persian Gulf. That structural vulnerability remains.
Infrastructure Defines Dependence
The Gulf Coast is connected to the Permian Basin and Canada by a dense network of crude pipelines. Oil moves efficiently by pipe to refining complexes in Texas and Louisiana, and from there into national product markets.
California has no such connection. There are no crude oil pipelines linking the Permian or midcontinent to the West Coast. Every barrel refined in California must be produced locally, shipped from Alaska, or delivered by tanker.
That isolation makes California functionally an energy island.
Declining Production, Rising Imports
California once ranked among the nation’s leading oil producers. Today, output has fallen sharply from its historical peak. According to the California Energy Commission, the majority of crude processed in the state now arrives via marine imports.
As in-state production declined, waterborne imports filled the gap. When global shipping lanes are stable, this model functions. When chokepoints tighten, the exposure becomes clear.
The 700,000 Barrel Reality
The United States still imports roughly 700,000 barrels per day from Saudi Arabia and Iraq. Over half of that transits the Strait of Hormuz. In a 20 million barrel per day national market, that volume may appear small.
The key issue is distribution.
Because Gulf Coast refiners can access domestic crude through pipelines, Persian Gulf barrels are not evenly spread across the country. A disproportionate share of those Saudi and Iraqi imports ends up in PADD 5, the West Coast refining district, precisely because California lacks pipeline access to Permian supply.
When shipments through Hormuz are disrupted, the shortfall is not felt uniformly. Houston has alternatives. Midwest refiners have alternatives.
California does not.
The missing barrels show up in Long Beach and the Bay Area first, because that is where import dependence is highest and substitution options are limited.
Refinery Configuration Limits Flexibility
Even if domestic crude could be redirected, California’s refining system presents another constraint.
Refineries are engineered around specific crude characteristics such as API gravity and sulfur content. Over decades, California facilities invested heavily to process heavier, higher-sulfur imported crudes from the Middle East and Latin America.
Light, sweet shale oil from the Permian Basin does not have the same economics when run through hardware optimized for heavier feedstocks. Large-scale substitution can increase costs and reduce gasoline and diesel yields at a time when capacity is already tight.
Capacity Is Shrinking
At the same time, California’s refining base is contracting.
Phillips 66 shut down its Los Angeles-area refinery complex in late 2025. Valero has announced plans to idle its Benicia refinery in 2026.
These closures remove a meaningful portion of statewide refining capacity in a short time frame. The Energy Information Administration has warned that refinery retirements on the West Coast increase the risk of higher gasoline prices in PADD 5.
To compensate, California has increased imports of finished gasoline and blending components from overseas markets, including the Bahamas and Asia.
Importing finished product can stabilize supply in the short term. It does not solve the underlying structural exposure.
Geography Still Governs Energy Markets
National production strength does not eliminate regional vulnerability. Energy independence at the federal level does not automatically translate into resilience at the state level.
California’s combination of declining in-state production, lack of crude pipeline connectivity, refinery configuration constraints, and shrinking capacity leaves it more exposed to disruptions in the Strait of Hormuz than most Americans realize.
When crude flows through that chokepoint tighten, the consequences are not abstract. They are reflected in fuel availability and prices on the West Coast.
In energy markets, infrastructure determines resilience. For California, the absence of connection to domestic supply remains the defining constraint.
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