 CANONSBURG, Pa.--BUSINESS WIRE-- ESG--Equitrans Midstream Corporation NYSE: ETRN released its annual corporate sustainability report, which was produced in accordance with the Global Reporting Initiative GRI Core option and also incorporated the Sustainability Accounting Standards Board SASB Oil Gas Midstream Standards. The report content reflects materiality assessment results, which identify the Environmental, Social, and Governance ESG topics most significant to the Companys bus 