Total U.S. coal stockpiles had a month-over-month increase of 1.7%, reaching 93 million tons in May 2022. This increase in total U.S. coal stockpiles follows the normal seasonal pattern whereby coal power plants increase their stockpiles during the spring months when electricity demand is lower on a seasonal basis. As in previous months, total U.S. coal stockpiles remain at a relatively low historical level.
The average number of days of burn held at electric power plants is a forward-looking estimate of coal supply given a power plant's current stockpile and past consumption patterns. For bituminous units largely located in the eastern United States, the average number of days of burn decreased from the previous month, going from 86 days of forward-looking days of burn in April 2022 to 72 days of burn in May 2022. For subbituminous units largely located in the western United States, the average number of days of burn also decreased, going from 94 days of burn in April 2022 to 82 days of burn in May 2022.
|May 2022||May 2021||April 2022|
|Zone||Coal||Stocks (1000 tons)||Days of Burn||Stocks (1000 tons)||Days of Burn||% Change of Stocks||Stocks (1000 tons)||Days of Burn||% Change of Stocks|
Source: U.S. Energy Information Administration
NOTE: Stockpile levels shown above reflect a sample of electric power sector plants, which were used to create the days of burn statistics. These levels will not equal total electric power sector stockpile levels.