Relating to the extension of groundwater reduction target years established by the Harris-Galveston Subsidence District.

HB 3818 extends by five years all existing groundwater reduction deadlines set by the Harris-Galveston Subsidence District for affected entities. It directly impacts municipalities, water utilities, industrial users, and groundwater permit holders by delaying their compliance dates. The bill requires the District to update its regulations and enforcement schedules within 90 days of the law's effective date. This is a procedural extension of current requirements, not a change to the reduction targets themselves, and takes effect immediately if passed with a two-thirds vote or September 1, 2025, otherwise.