Your sewer charge is determined by Pima County Regional Wastewater Reclamation Department. Metro Water includes the sewer charge on your water bill as a convenience to the customer.
Sewer rates are calculated by using your average water usage in December, January and February, which are considered the lowest water use months. If you can show that three other consecutive months have a lower water usage, you can work with Pima County to have that average used to calculate your sewer charge. If you know the lower three months already, click here to appeal online.
All questions and inquiries about your sewer charge should be directed to Pima County Regional Wastewater Reclamation Department at 520-724-6609 (option 4) or go to their website.