How is the residential sewer (wastewater) bill calculated?
A. Because it is not cost effective to meter wastewater use, City of Austin Austin Water Utility estimates it. To estimate wastewater use, City of Austin Austin Water Utility uses the average of the two lowest water consumption months during the December through February billing periods. This is thought to be the best time to average because customers water their lawns less in the winter. However, if a customer’s current month’s actual water use is less than the winter months average, the customer’s sewer (wastewater) bill is based on the actual water use.
