The bill has wastewater, sewer usage, sanitary sewer, or treatment charges that are higher than expected.
Wastewater charges may be based on water use, a winter average, a fixed fee, or a separate sewer rate. Reducing water use helps only when the charge is tied to usage.
Check first
Find wastewater, sewer usage, sanitary sewer, and treatment line items.
Check whether the charge uses gallons, CCF, a winter average, or a flat fee.
Compare water usage with sewer usage if both are shown.
Look for outdoor water that may or may not count toward wastewater.
Practical savings moves
Use water savings math only for the portion tied to usage.
Reduce indoor water use first when wastewater follows metered water.
Check irrigation or outdoor meter rules if outdoor water is billed differently.
Read the sewer term page before assuming every gallon affects wastewater.
Avoid these mistakes
Do not assume wastewater is optional because it appears separate from water.
Do not expect outdoor water cuts to lower sewer if the city uses winter averaging.
Do not ignore fixed sewer charges when calculating savings.