Welcome to Sanitation District No. 1 (SD1). We proudly provide the Northern Kentucky region with wastewater and storm water services to protect public health, property and the environment. Our infrastructure also supports the economic vitality of the community we serve. Twenty-four hours a day, 365 days a year, our experts work as a team to take away and clean the dirty water created by Northern Kentucky residents when they flush, brush and shower, and the storm water that collects during rains or snow thaws. We work with partners across our region and beyond to find innovative and cost-effective solutions for our community.