Working gas in storage was 3,201 Bcf as of Friday, September 16, 2011, according to EIA estimates. This represents a net increase of 89 Bcf from the previous week. Stocks were 129 Bcf less than last year at this time and 35 Bcf below the 5-year average of 3,236 Bcf. In the East Region, stocks were 76 Bcf below the 5-year average following net injections of 58 Bcf. Stocks in the Producing Region were 41 Bcf above the 5-year average of 962 Bcf after a net injection of 22 Bcf. Stocks in the West Region were 1 Bcf above the 5-year average after a net addition of 9 Bcf. At 3,201 Bcf, total working gas is within the 5-year historical range.

http://ir.eia.gov/ngs/ngs.html