US natural gas stockpiles in underground storage stood at 3,351 billion cubic feet for the week ending Sept. 18, up 53 Bcf from the previous week, the Energy Information Administration said in its weekly report Thursday.
Inventories were 146 Bcf below year-ago levels and 95 Bcf above the five-year average of 3,256 Bcf.
At 3,351 Bcf, total working gas remains within the five-year historical range, the EIA said.