Sewer service involves the collection and treatment of wastewater. Wastewater is “used” water that is deposited into drains by residents and businesses. Flushing the toilet, taking a shower, and running the washing machine are all examples of everyday activities that produce wastewater. This wastewater drains down the sink or toilet and travels through a network of underground pipes known as the sanitary sewer system. Reclaiming wastewater is fundamental to protecting our water supply and guarding against water pollution.