EIA Data Shows 44 Bcf Build in US Gas Stocks
US natural gas inventories rose by 44 Bcf to 3,298 Bcf, driven by Midwest and East additions despite year-over-year deficits.
US natural gas inventories increased by 44 billion cubic feet (Bcf) in the week ending September 11, 2026, according to the Energy Information Administration. Total working gas in underground storage reached 3,298 Bcf, placing current levels 118 Bcf above the five-year average of 3,180 Bcf. Although stocks remain 122 Bcf below the level recorded in the same week last year, the build keeps total inventories within the historical five-year range.
Regional data from the EIA report indicates that the Midwest and East regions drove most of the weekly increase. The Midwest added 26 Bcf to reach 934 Bcf, while the East region gained 22 Bcf to total 795 Bcf. These additions contributed to a net positive flow across the Lower 48 states, offsetting small withdrawals in other areas.
Regional inventory shifts
Withdrawals were recorded in the Pacific, South Central, and South Central Salt regions. The Pacific region saw a 1 Bcf drop to 289 Bcf, while the South Central region decreased by 5 Bcf to 1,039 Bcf. The South Central Salt sector also declined by 5 Bcf to 222 Bcf. Despite these local reductions, the Mountain region posted a slight 2 Bcf increase to 241 Bcf.
The South Central and South Central Salt regions are the only areas currently trading below the five-year average. The South Central region sits 0.2% under the average of 1,041 Bcf, and the Salt sector is 8.3% below its five-year mean of 242 Bcf. All other regions, including the East, Midwest, and Mountain, remain above their respective historical averages.
Historical context and outlook
Current stock levels are 3.6% lower than the 3,420 Bcf recorded in the same week of 2025. This year-over-year deficit reflects lower injection rates or higher withdrawal demand compared to the previous cycle. However, the 3.7% premium over the five-year average suggests that supply conditions remain comfortable relative to long-term norms.
The EIA’s weekly data provides a snapshot of underground storage dynamics, which directly influence natural gas pricing and utility procurement strategies. With inventories within the normal historical band, market participants are monitoring regional imbalances for clues on near-term demand patterns. The consistent build in key consumption centers like the Midwest and East indicates stable injection activities ahead of the heating season.
