Rocky Mountain gasoline inventory ·EIA week ending September 4, 2026
Rocky Mountain gasoline storage holds 6.3 M bbl as of September 4, 2026, down 0.3% week over week.
Rocky Mountain (PADD 4) gasoline inventory
September 17, 2021 to September 4, 2026
Shaded band: the same calendar week's range across the five prior years; dashed line: their average. The record low and high are on the range strip above, not in the band.
Weekly PADD 4 total motor gasoline stocks, in millions of barrels. Source: U.S. Energy Information Administration, Weekly Petroleum Status Report.
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About this series
Total motor gasoline, including blending components, held in tanks and terminals across PADD 4, the Rocky Mountain district. Reported weekly by the U.S. EIA as one of five regional cuts of the national gasoline series. PADD 4 is the smallest gasoline market in the system, served by a handful of refineries and long supply lines. A swing that would vanish in the Gulf Coast number can move this district's whole balance, which is why mountain-state pump prices react sharply when a regional refinery goes down.
Since 2015, today's reading ranks in the 7th percentile. Rocky Mountain gasoline stocks are lean by modern standards. It is 0.2M bbl below its same-week five-year average. Across the full EIA record back to 1990 it ranks in the 34th percentile; storage capacity, pipelines, and production have shifted enough since then that the modern cohort is the better yardstick for today's operating conditions.
Weekly PADD 4 total motor gasoline stocks, in millions of barrels. Source: U.S. Energy Information Administration, Weekly Petroleum Status Report. Updated weekly. View this series at eia.gov ↗
Rocky Mountain gasoline inventory: common questions
- What is PADD 4?
- PADD 4 is the Rocky Mountain district of the Petroleum Administration for Defense Districts, the five regions the EIA uses to report US petroleum statistics. It covers Colorado, Idaho, Montana, Utah, and Wyoming. The district lines were drawn for World War II fuel allocation and remain the standard regional cut of US oil data.
- What does this page track?
- The total volume of motor gasoline held in tanks and terminals across PADD 4 (Rocky Mountain), including blending components not yet mixed into finished fuel. It is the EIA's regional cut of the same weekly series the national gasoline page tracks, and the five districts sum to the US total.
More questions
- Why do Rocky Mountain gasoline inventories matter?
- PADD 4 is the smallest gasoline market in the system, served by a handful of refineries and long supply lines. A swing that would vanish in the Gulf Coast number can move this district's whole balance, which is why mountain-state pump prices react sharply when a regional refinery goes down.
- How often is this figure updated?
- The EIA publishes the figure every week, typically Wednesday around 10:30 a.m. Eastern for the prior Friday's week. This page reads that same EIA series and shows the latest reading with its as-of date.