Rocky Mountain distillate inventory ·EIA week ending August 21, 2026
Rocky Mountain distillate storage holds 3.7 M bbl as of August 21, 2026, up 8.1% week over week. It is currently building faster than usual.
The Desk's read
Diesel and heating fuel is piling up fast in the Rocky Mountain district, the four states EIA groups as PADD 4. Stocks reached 3.7 MM bbl as of 2026-08-21, rising 15.5% over 30 days, with the trailing four-report build sitting at the 87th percentile of all such stretches in the 37-year record. But the pile itself is only mid-range, the 73rd percentile of that record, so a brisk build lands on a merely comfortable base. We track the next reading in next Wednesday's EIA weekly report; watch whether the fast build holds or cools.
Rocky Mountain (PADD 4) distillate inventory
September 3, 2021 to August 21, 2026
Weekly PADD 4 distillate fuel oil stocks, in millions of barrels. Source: U.S. Energy Information Administration, Weekly Petroleum Status Report.
Rocky Mountain distillate stocks are building faster than usual. We watch US distillate inventories weekly.
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About this series
Distillate fuel oil, the category covering diesel and heating oil, 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 distillate series. PADD 4 holds the smallest distillate cushion of the five districts, supplying mining, ranching, and long-haul trucking across the mountain states from a handful of refineries. Thin regional stocks mean local prices react quickly when supply tightens.
Today's reading sits in the upper part of the EIA record going back to 1990. Rocky Mountain distillate stocks are running above their typical level.
Weekly PADD 4 distillate fuel oil 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 distillate 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 distillate fuel oil, covering diesel and heating oil, held in tanks and terminals across PADD 4 (Rocky Mountain). It is the EIA's regional cut of the same weekly series the national distillate page tracks, and the five districts sum to the US total.
More questions
- Why do Rocky Mountain distillate inventories matter?
- PADD 4 holds the smallest distillate cushion of the five districts, supplying mining, ranching, and long-haul trucking across the mountain states from a handful of refineries. Thin regional stocks mean local prices react quickly when supply tightens.
- 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.