The Innovative Water Infrastructure Workforce Development program provides grants to build the water workforce and connect individuals to careers in the drinking water and wastewater utility sector. IIJA amends the program by expanding grant use to include diversity recruitment and promotion, training, and retention within the water sector, among other changes. Amends the scope of the Innovative Water Infrastructure Workforce Development Program to include: (1) Expanding the use and availability of activities and strategies pertaining to the development of innovative activities and strategies, that relate to the retention and maintenance of a sustainable workforce, (2) Expanding the availability of training opportunities for individuals entering into and seeking career advancement within the water and wastewater utility sector.