I was interested in looking at Chicago's stats. The average water bill is around $40 per month, which is not as high as the transportation or rent expenses because it's in a city. It has increased by 79% since 2008, probably because the resources from Lake Michigan have been depleted. It has also outpaced the growth of income because income increased by 27% while water increased by 79%. Low-income households need to work 11 hours.