The US environmental regulatory landscape has undergone significant change over the last year, with executive orders and presidential statements from the Trump Administration and a flurry of proposed rules from the Environmental Protection Agency (EPA). This briefing highlights key developments that will shape 2026, including the repeal of the endangerment finding, California's climate disclosure regime, the Environment Protection Agency's (EPA's) expansion of PFAS – "forever chemicals" – reporting and cleanup obligations, changes to greenhouse gas reporting obligations and Clean Water Act (CWA) jurisdiction. Regulated companies across multiple sectors should plan for continuing shifts in compliance requirements and related operating impacts.

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