Here are the details for our bill. We have a 2000sf house and a separate 700 sf casita. Total residents 4 adults, 2 kids, 1 dog. Landscaping is watered with drip irrigation, which is turned off after every rain. During the winter, we pretty typically stay in the first pricing tier, during the spring/summer/fall we start going into the 2nd tier (more expensive).
Base water fee: $38.66
Water Used: $62.17 (14HCF first tier, 3 2nd tier)
Sewer base fee (less settlement): $30.66
Sewer service charge (based on water use): $60.74
Storm Drain: $1.90
So the fixed costs are pretty high – about $70/2 months. My total bill was $194.28.
It goes higher if you have a lot of lawn, a pool, teenagers who spend hours in the shower. (My kids are still young enough I have to tell them to take showers.)