Save water to reduce sewer charges An easy way to save on your sewer bill is to use low-flow faucets in the sink and showerhead. A faucet or low-flow showerhead controls the flow of water so you don't use more than you need. It may take some time for you to get used to using less water while showering or washing dishes, but the savings over time will undoubtedly be significant. As an added benefit, you'll also lower your energy bill by needing less energy to heat water. The solution would be to wash less clothes.
It is convenient to wash small loads from time to time, but it is not economical. Wait until one day of the week when you can throw away all the clothes you have at once to reduce the amount of water you are going to use.