Saving water is important but so is washing your hands. Washing fruit and vegetables under running water removes loose soil and helps to remove many bacteria and viruses. If you wash fruit and vegetables that are not going to be cooked in a bowl to save water this can just create a microbiological soup that may re-contaminate the food or your hands depending on the types and amounts washed. Alternatively, you can catch running water used for washing in a bowl or bucket and then put it on the garden where it will not contact other ready to eat fruits, vegetables and herbs. Read labels of pre-cut or peeled fruits and vegetables. If they have already been washed before packaging and they are within their use by date then washing again is not necessary.
Don’t be tempted to save electricity by making your fridge warmer. It must run at 5°C or below to make sure bacteria don’t grow.