HI HB343

Defines "isolated wetland" as a wetland not included in navigable waters of the United States, and "wetland" as areas inundated or saturated by surface or ground water that support vegetation adapted to saturated soil conditions, including swamps, marshes, bogs, fens, and similar areas.

Amends the definition of "state waters" to explicitly include wetlands and isolated wetlands within state regulatory jurisdiction.

Requires the Director of Health to delineate all wetlands within the State and determine whether each wetland is an isolated wetland or included in waters of the United States.

Prohibits any person from discharging water pollutants into state waters or at any location that may cause or allow pollutants to enter state waters without compliance with chapter 342D, applicable rules, or a permit, water quality certification, or variance from the director.

Takes effect upon approval and responds to the 2023 Supreme Court Sackett v. EPA decision that limited federal Clean Water Act jurisdiction over certain wetlands.