Arizona can now approve underground injection wells for itself, not the US environmental regulators

The US environmental regulators propose to let Arizona manage its own underground injection wells. This means Arizona will decide where and how companies can inject waste and other fluids underground, instead of the federal government.

States often want to manage their own environmental programs. This move shifts responsibility for a key environmental permit from federal to state control. It means that companies operating in Arizona will now deal with state regulators, not federal ones, for these types of permits.