Florida reserves its deepest aid from a federal water fund for small towns, excluding bigger low-income communities.By Kate WaxmanBelle Glade is one of the poorest cities in Florida, a majority-Black farmworker community on the southern rim of Lake Okeechobee, where clean and reliable drinking water has never been a given. But when Belle Glade looked to the largest source of federal money for fixing drinking water systems, it ran into an obstacle that has nothing to do with how poor it is.