The safety of U.S. liquids pipelines has improved across several key metrics over the past five years, according to a new joint report from the American Petroleum Institute (API) and the Association of Oil Pipe Lines (AOPL).

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“Pipelines are not only the best way to deliver large volumes of liquids energy; they are also the safest,” Phillips 66 Pipeline LLC President Todd Denton said in API and AOPL’s annual 2021 Pipeline Safety Excellence Performance Report. “Pipelines deliver liquid energy with fewer incidents and lower volumes released than other transportation alternatives.”

Citing 2017-2021 data tracked and maintained by the U.S. Department of Transportation’s Pipeline and Hazardous Materials Safety Administration, API and AOPL reported a 31% drop in liquids...