With the drought continuing in many places, using fresh, treated water from the tap for everything is beginning to seem very wasteful. If you want to save water and save money, too, there are a lot of ways to do it.
For instance, at any given time you walk into my kitchen, there will be a glass or glasses set back on the counter with varying levels of water in them. I fill each one as water becomes available from leftover drinking water and melted ice from drinks. It's then used to water the house plants or to dump on the floor for a quick mop up.
There is at times a bucket just outside the back door that holds rinse water from doing dishes or water that's run to heat up or cool down, or water that I've rinsed my hands in. I use it to water outside plants or sometimes to mop the floor. I've washed the car with it and even washed windows with it. It's plenty clean enough for things like that.
Water that has been used to rinse dishes with is sometimes recycled in the bathroom to wash the sink or toilet - and again, the floor.
There's always the shower water which can be used to flush the toilet, pour out on plants or lawn, scrub the floor or wash the car.
When I'm cooking, I leave a pan of water in the kitchen sink to rinse my hands between tasks. When I stopped to pay attention, I was amazed at how many times I turned on the water for that.
Leftover tea or coffee waters plants, too. Put the sugared drinks on outdoors plants to avoid attracting insects into the house.
Go to Extremely Frugal and search for water. There are many, many ways to reduce the amount of water we use.