Advanced Waste Solutions (AWS) is your one stop location for all your dumpster, portable restrooms and septic system pumping services. Locally owned and operated in Callendar, Iowa, we are the only call you need for all your residential and commercial projects. No project is too small or too large for our staff to deliver to your location for a single day, a week or even more. Only need our products or services for a weekend? No problem we can do that too.