Find your water bill from daily usage.
Daily usage is totalled over the billing period, converted to kilolitres, and multiplied by your local tariff.
Cost: (Total litres ÷ 1000) × tariff per 1000 litres
Why do water tariffs vary so much by location?
Water supply is managed by local city governments, and each one sets its own rates. Both the price and even the billing unit can be very different from city to city.