Water bill?

Hey homeowners -- I'm trying to determine what's a typical quarterly water bill for a two-adult household in our area. If you're willing, could you please comment with your typical monthly bill, and note the following:

-How many adults does that cover?
-Are dishes washed primarily by hand or in a dishwasher?
-Any other factors you think raise or lower your water usage compared to the average for your type of household?

Thanks!

Our house bill is ~$450 per quarter, for 4 adults and a baby, and a dishwasher in each unit. I think my partner and I use a typical amount of water and the folks upstairs think they use a large amount of water, but we're not separately metered so we're not sure how to divide the bill.

Thanks for contributing your information! :-)