Exhibit 99.1 NEWS RELEASE DT Midstream Reports Strong First Quarter 2024 Results DETROIT, Apr. 30, 2024 – DT Midstream, Inc. (NYSE: DTM) today announced first quarter 2024 reported net income of $97 million, or$0.99 per diluted share. For the first quarter of 2024, Operating Earnings were $97 million, or$0.99 per diluted share. Adjusted EBITDA for the quarter was $245 million. Reconciliations of Operating Earnings and Adjusted EBITDA (non-GAAP measures) to reported net income are included at the end of th ...