Over the last two years, we have had our water towers cleaned by a company called Liquid Engineering. This company has the ability to vacuum any sediment from the tanks and inspect the entire tank inside and out with an audio and video recording. A diver in a dry-suit is disinfected with a strong chlorine solution, and he enters the tank full of water while it is still in service. This service allows us to know just exactly what shape our tanks are in, and that they are free from any settling particles. In the past, we had to empty millions of gallons of water to perform this process.