Total U.S. coal stockpiles had a month-over-month decrease of 4.8%, reaching 80 million tons in September 2021. This is now the lowest level of total monthly U.S. coal stockpiles recorded since these data were collected using the power plant operations report beginning in 2001.
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 increased slightly from the previous month, going from 86 days of forward-looking days of burn in August 2021 to 88 days of burn in September 2021. For subbituminous units largely located in the western United States, the average number of days of burn remained unchanged from the previous month at 82 days of burn.
|September 2021||September 2020||August 2021|
|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.