WASHINGTON—Volkswagen AG on Monday said it has agreed to pay $1.5 million to settle environmental claims with the states of New Hampshire and Montana over post-vehicle updates of software emissions arising from the 2015 diesel cheating scandal. The settlements for about $280 per vehicle is a small fraction of the maximum liability the German automaker faces over the issue of whether states can enforcement emissions laws over updates to emissions after the vehicles were sold. VW will pay New Hampshire $1.15 million and it pledged to build another high-speed charging station in the state by 2024. VW has agreed to pay Montana $357,280. VW last month asked the U.S. Supreme Court to reverse an Ohio court ruling that cleared the way for the state to move forward with its diesel emissions lawsuit. VW said in court papers Ohio’s claims “could total $350 million per day, or more than $127 billion …