"PG&E" refers to Pacific Gas and Electric Company, a subsidiary of PG&E Corporation. © 2023 Pacific Gas and Electric Company. All rights reserved.
As you make gas purchases, be sure to take gas shrinkage into account. Shrinkage gas is necessary to provide compressor fuel and to replace lost and unaccounted for (LUAF) gas supplies. Shrinkage gas is supplied in-kind by the shipper. That is, shippers must supply more gas at a California Gas Transmission receipt point than they receive at the delivery point. The difference is shrinkage.
Current and historical shrinkage rates are shown below. Shrinkage formulae and examples are available at Calculating Shrinkage.
Transmission Shrinkage
| Redwood to Off-system | Mission Path | All Other Transmission Paths | Storage Injection | |
|---|---|---|---|---|
| As of Nov. 1, 2023 | 0.9% | 0.0 | 1.3% | 0.7% |
| As of Apr. 1, 2023 | 0.9% | 0.0 | 1.3% | 0.7% |
| As of Nov. 1, 2022 | 0.9% | 0.0 | 1.3% | 0.9% |
| As of Apr. 1, 2021 | 0.9% | 0.0 | 1.2% | 0.9% |
| As of Nov. 1, 2020 | 0.9% | 0.0 | 1.3% | 0.9% |
| As of Nov. 1, 2019 | 0.9% | 0.0 | 1.2% | 0.9% |
| As of Nov. 1, 2018 | 0.8% | 0.0 | 1.1% | 0.9% |
| As of Nov. 1, 2017 | 0.9% | 0.0 | 1.2% | 0.9% |
| As of Apr. 1, 2017 | 0.9% | 0.0 | 1.2% | 0.9% |
| As of Nov. 1, 2015 | 0.9% | 0.0 | 1.2% | 1.0% |
| As of Apr. 1, 2015 | 0.9% | 0.0 | 1.1% | 1.0% |
| As of Nov. 1, 2014 | 0.9% | 0.0 | 1.1% | 1.2% |
| As of Apr. 1, 2014 | 0.9% | 0.0 | 1.0% | 1.2% |
| As of Nov. 1, 2011 | 0.9% | 0.0 | 1.0% | 1.1% |
| As of May 1, 2011 | 0.9% | 0.0 | 0.8% | 1.1% |
| As of Jan. 1, 2011 | 0.9% | 0.0 | 1.1% | 1.1% |
| As of Nov. 1, 2009 | 1.0% | 0.0 | 1.4% | 1.1% |
| As of Nov. 1, 2008 | 0.9% | 0.0 | 1.3% | 1.1% |
| As of Nov. 1, 2006 | 0.9% | 0.0 | 1.3% | 1.1% |
| As of Apr. 1, 2006 | 0.9% | 0.0 | 1.2% | 1.1% |
| As of Mar. 1, 2006 | 0.9% | 0.0 | 1.2% | 1.0% |
| As of Apr. 1, 2005 | 1.0% | 0.0 | 1.2% | 1.0% |
| As of Jan. 1, 2005 | 1.0% | 0.0 | 1.2% | 0.8% |
| As of May 1, 2004 | 1.11% | 0.0 | 1.2% | 0.8% |
| As of Jan. 1, 2004 | 1.11% | 0.0 | 1.2% | n/a |
| As of Mar. 1, 2003 | 1.11% | 0.0 | 1.35% | n/a |
| As of Mar. 1, 2002 | 1.11% | 0.0 | 0.79% | n/a |
| As of Jan. 1, 2002 | 1.11% | 0.0 | 1.35% | n/a |
| As of Oct. 1, 2000 | 1.11% | 0.0 | 1.37% | 0.0 |
| As of Nov. 2, 1998 | 1.11% | 0.0 | 1.73% | n/a |
| As of Sep. 1, 1998 | 1.11% | 0.0 | 1.73% | n/a |
| As of Mar. 1, 1998 | 1.11% | 0.0 | 1.72% | n/a |
Distribution Shrinkage
| Season | Core | Noncore on Distribution System | Noncore on Local Transmission System | |
|---|---|---|---|---|
| As of Nov. 1, 2023 | Summer (Apr - Oct) | 0.8% | 0.2% | 0.0 |
| Winter (Nov - Mar) | 3.9% | 0.2% | 0.0 | |
| As of Nov. 1, 2022 | Summer (Apr - Oct) | 1.0% | 0.2% | 0.0 |
| Winter (Nov - Mar) | 3.7% | 0.2% | 0.0 | |
| As of Apr. 1, 2021 | Summer (Apr - Oct) | 0.8% | 0.1% | 0.0 |
| Winter (Nov - Mar) | 2.7% | 0.1% | 0.0 | |
| As of Nov. 1, 2020 | Summer (Apr - Oct) | 1.2% | 0.2% | 0.0 |
| Winter (Nov - Mar) | 3.1% | 0.2% | 0.0 | |
| As of Nov. 1, 2019 | Summer (Apr - Oct) | 1.9% | 0.2% | 0.0 |
| Winter (Nov - Mar) | 3.7% | 0.2% | 0.0 | |
| As of Nov. 1, 2018 | Summer (Apr - Oct) | 2.2% | 0.2% | 0.0 |
| Winter (Nov - Mar) | 3.6% | 0.2% | 0.0 | |
| As of Nov. 1, 2017 | Summer (Apr - Oct) | 1.8% | 0.2% | 0.0 |
| Winter (Nov - Mar) | 3.5% | 0.2% | 0.0 | |
| As of Nov. 1, 2015 | Summer (Apr - Oct) | 2.4% | 0.1% | 0.0 |
| Winter (Nov - Mar) | 3.2% | 0.1% | 0.0 | |
| As of Nov. 1, 2014 | Summer (Apr - Oct) | 1.6% | 0.1% | 0.0 |
| Winter (Nov - Mar) | 3.0% | 0.1% | 0.0 | |
| As of Nov. 1, 2011 | Summer (Apr - Oct) | 1.7% | 0.2% | 0.0 |
| Winter (Nov - Mar) | 2.9% | 0.2% | 0.0 | |
| As of May 1, 2011 | n/a | 0.9% | 0.2% | 0.0 |
| As of Jan. 1, 2011 | n/a | 2.6% | 0.2% | 0.0 |
| As of Nov. 1, 2009 | n/a | 3.0% | 0.2% | 0.0 |
| As of Nov. 1, 2008 | n/a | 3.3% | 0.2% | 0.0 |
| As of Nov. 1, 2006 | n/a | 3.1% | 0.2% | 0.0 |
| As of Mar. 1, 2006 | n/a | 2.9% | 0.2% | 0.0 |
| As of Apr. 1, 2005 | n/a | 2.1% | 0.2% | 0.0 |
| As of Jan. 1, 2005 | n/a | 2.1% | 0.2% | 0.0 |
| As of May 1, 2004 | n/a | 2.4% | 0.2% | 0.0 |
| As of Jan. 1, 2004 | n/a | 2.4% | 0.2% | 0.0 |
| As of Mar. 1, 2003 | n/a | 2.41% | 0.16% | 0.0 |
| As of Mar. 1, 2002 | n/a | 1.88% | 0.12% | 0.0 |
| As of Jan. 1, 2002 | n/a | 2.41% | 0.16% | 0.0 |
| As of Oct. 1, 2000 | n/a | 2.31% | 0.16% | 0.0 |
| As of Nov. 2, 1998 | n/a | 4.02% | 0.22% | 0.0 |
| As of Sep. 1, 1998 | n/a | 4.02% | 0.22% | 0.0 |
| As of Mar. 1, 1998 | n/a | 3.31% | 0.21% | 0.0 |
If you have any questions regarding these shrinkage rates, please contact your CGT representative.