The commission is responsible for developing and enforcing safety standards for natural gas and hazardous liquid pipelines located within the state. The commission also inspects the portions of interstate natural gas and hazardous liquid pipelines located within Washington state; the standards and enforcement actions are the responsibility of the federal Pipeline and Hazardous Materials Safety Administration (PHMSA).
Pipelines We Regulate
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Pipeline News and Activities
Call Before You Dig
Reports and Studies
Pipeline Siting in Washington
Citizens Committee on Pipeline Safety (CCOPS)