[disc]

Not to say your analysis is flawed, but SFPUC rounds everyone's water usage to the nearest 'unit' (748 gallons) meaning that anyone who uses less than 748 gallons/month is paying at least €8.05/kiloliter (based on my consistent $25/one-unit bill.)

As a single guy, I consume nowhere near my allocated 748 gallons/month, meaning my effective rate is even higher.

[knughit]

You don't use 25gal/day to shower and wash and toilet? Shower is 2gal/minute and toilet is 1gal/flush, or more.

[ptaipale]

You can take showers and use the toilet and spend less than that.

My family's consumption is 105 litres (28 gallons) per person per day. And we don't really think about the water consumption but I think we use it abundantly; we do sports and naturally take daily showers, have sometimes guests who also use toilet, etc.

[ameen]

How do businesses deal with water usage in their premises? (Gyms, offices, etc with showers, etc). Is this something to consider whilst factoring in expenses?

[ptaipale]

Each facility of course has their own water contract, right? What we were talking about is the domestic use.

I cycle to work, and it means that I take a shower in the morning at the office building, and another one in the evening back home. So one shower per day is included in the domestic consumption (for me, and for others who don't cycle but also take a daily shower at home).

I don't think that's so different between U.S., Copenhagen or my place (Finland). It might be different in less modernist cultures where people don't have bathrooms of their own but go to communal baths -- for example, communities in East Karelia/Russia; there many people just bath twice a week in a public баня and that would surely show up in water consumption per person when measured per apartment. On the other hand, there you probably will see that water is not priced at cost and many many taps will leak a lot...