Thanks to a chemical shortage at a water treatment plant, Casper and surrounding areas are under a water restriction. Wednesday's announced restrictions come less than two weeks after city officials issued a conservation request. According to the announcement, there was a dip in water use, but it wasn't enough for officials to take the possibility of a full irrigation ban off the table. Beth Andress, a city spokesperson, said the "number one priority" is having a water supply for drinking and household us. Get our free mobile app "[B]y limiting irrigation we can do just that," Andress said in a news release. "Unfortunately, this means that if irrigation usage does not decline to a sufficient level, a full irrigation ban may be issued."