Nogales Wastewater Improvement Act of 2023

HR 4643, the Nogales Wastewater Improvement Act of 2023, limits the cost share for the City of Nogales, Arizona, on a shared wastewater infrastructure project. It specifies that the city's financial responsibility covers only the treatment and conveyance of its own wastewater, excluding costs related to wastewater originating in Nogales, Sonora, Mexico. The bill transfers ownership of the International Outfall Interceptor pipeline to the U.S. Section of the International Boundary and Water Commission (IBWC) after required agreements with Arizona authorities, and authorizes $6.5 million for IBWC operations in 2025 plus $2.5 million annually thereafter. It also mandates construction of a debris screen at Manhole One to intercept drug bundles from Mexico, with $8 million allocated for this in 2025 and ongoing maintenance funding. The changes take effect October 1, 2024.