We're lucky as we have our own water supply, a very deep well with pump which fills a big tank as needed then straight into the house. We also have a large waterbutt catching rainwater
from the garage roof , just in case! We still don't waste water, ie not leaving taps on while washing hands, or cleaning teeth, (tbh I've never done that!) short flush for the loo and so on. Our main area of saving is electricity and in that we have made what savings we can. I hardly use the dishwasher anymore,but I'm not sure if that's a particular saving, washing machine on 30min wash twice a week, (I soak clothes overnight if necessary) or occasionally more if full, low energy light bulbs, hot water heater in utility room which does for the kitchen and bathroom, electric shower, no bath, no tumble drier, no central heating, TV on a time switch, wood burner for heating and some cooking, as ours has a ring and oven so I'm not sure we can do much else!