Relating to dual certification for water or sewer service in an area incorporated or annexed by certain municipalities.

SB 2136 allows specific large border municipalities (those with over 800,000 residents, located on an international border, and containing at least two cities of 100,000+ residents) to seek "dual certification" for water or sewer service. This means qualifying cities could authorize both their own utility and a private franchised utility to serve the same annexed or incorporated area, instead of requiring a single provider. The bill requires the municipality to notify the utility commission and enter agreements with the utility, after which the commission would grant dual certification. It applies only to the largest qualifying border municipalities and modifies existing certification procedures under Texas Water Code Section 13.255. The bill takes effect September 1, 2025.