[joquarky]

> the increased amount of sewage

How is there more than an office full of people?

[quickthrowman]

More toilets, more sinks, plus laundry. A floor of apartments will use far more water than a floor used by an office tenant. A 20k sqft office tower floor might have 6-8 toilets and 6-8 sinks that see light usage for 40 hours a week.