I live in Westlake Hills (a suburb west of Austin, TX). I have a 6 kW solar system, natgas heat pump & water heater, and five people live in the house. I have 4 separate utility bills for water, wastewater, gas & electricity ranging from $362 to $1161/yr. Which bill is $1161/yr?
The results are in. Here were my utility bills for 2019:

Wastewater: $1161.61
Electricity: $998.18
Natural gas: $418.97
Water: 361.81

Wastewater is expensive!

I am looking to expand my solar system to reduce my electric bill further. Might add more rainwater harvesting too.
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