Your bill may consist of several different charges depending on your location. For example, you may receive an operation and maintenance charge shown on your bill as ‘District Water’ or ‘District Sewer’. These funds are used to operate and maintain the Northwestern Water & Sewer District infrastructure that serves your home. You may also receive a separate treatment charge on your bill from another provider such as the Cities of Toledo, Perrysburg, Oregon, etc. These funds are charged by that city for the treatment of your water or wastewater and may be shown on your bill as ‘Toledo Water’ or ‘Oregon Sewer’, for example.