About 20.2% of the population was below the poverty line. Caldwell has held an annual Indian Creek Festival every September since 2003. The event includes a fun run and a tug of war. Caldwell has 10 city parks, a public golf course near downtown, a city pool, and two skateparks. Caldwell has five secondary schools—including Caldwell High School and Vallivue High School—and six elementary schools. The College of Idaho is located in Caldwell and is one of the oldest four-year institutions in the state. Caldwell Industrial Airport is located southeast of downtown. Caldwell has a high-quality water system, which remained untreated and met all federal guidelines until the 1990s when the Federal Government mandated chlorination.