The storm sewer takes stormwater and other clear water (rainwater, melted snow, runoff from lawns, rooftops, etc.), and sends it through a system of underground pipes that spill out directly into area waters. This water is not treated and goes directly into the environment.
The sanitary sewer system carries anything you flush down the toilet, or send down the drains in your home, including water from toilets, showers, sinks, dishwashers, washing machines, and other plumbing components. For homes hooked up to municipal sanitary sewer in our service area, this wastewater is sent through an underground sanitary sewer pipe system to our treatment facilities, where it is treated and returned into the environment.