Natural gas storage operators injected a net 90 Bcf into Lower 48 inventories in the week to Oct. 5, matching the five-year-average build, the U.S. Energy Information Administration reported.

The build, which matched the 90-Bcf expectation of S&P Global Platts, brought total working gas supply in the Lower 48 to 2,956 Bcf, or 627 Bcf below the year-ago level and 607 Bcf below the five-year-average.

By region:

* In the East, storage levels grew 27 Bcf on the week at 790 Bcf, down 10% from a year ago.

* In the Midwest, stockpiles grew 35 Bcf at 871 Bcf, down 15% from the year-ago level.

* In the Mountain region, stockpiles were up 3 Bcf at 180 Bcf, down 19% from the year before.

* In the Pacific region, inventories were even at 262 Bcf, down 17% from the year-ago level.

* In the South Central region, stockpiles grew 25 Bcf at 854 Bcf, 26% below a year ago.

Of that total, 191 Bcf was in salt cavern facilities and 663 Bcf was non-salt-cavern. Working gas stocks rose 6% in salt cavern facilities from the previous week and rose 2.3% in non-salt-cavern facilities.

S&P Global Platts and S&P Global Market Intelligence are owned by S&P Global Inc.