An engineering website has a feature about recent improvements made in water treatment. It reports about a water supply company that serves 1.2 million customers in the southwestern portion of the UK. The company supplies water and treats sewage. Recently, the company did some maintenance on its plant, which uses 20,000 filters. This time, the company used a software program. The program was able to use models to simulate the flow of water. It was thus able to improve efficiency.