This study examined methane emissions from distribution main and service pipelines within the state of California. Natural gas, which is comprised of mostly methane, leaks from various sources along the distribution pipeline. The objective of the project was to develop California-specific emission factors (EFs) for various pipe material types commonly found in natural gas utility distribution systems. These factors can then be used to improve the accuracy of the reporting of total emissions for natural gas local distribution companies (LDCs).
