I agree that an essential use of water would also be to water veg in the garden. Here near to Beccles we have had a few heavy showers of rain over the last few weeks even so the lawn is lovely shade of golden brown with the odd touch of green here and there. You cannot let fish die in a pond. I think the mentioning of conserving water is for those who do not have enough of a net between the ears to think for themselves. I will tell a tale. Back in 1976 or whenever it was that we had the last 'drought' (by the way in some parts of India its doesn't rain for 5 years), my then brother-in-law decided to run a hose from his house to his allotment which was directly behind the house. Now not being that bright and I am being polite here, the dozy whatsit went off to bed and left the hose running. Surprise surprise in the morning when they woke up , no water in the taps, the Water Board had turned them off. My sister in law nearly annihilated him. Kids had to go to school , she had to go to work, and no water.
A pal of mine who I write to in Kent tells me her neighbour has a sprinkler going night and day in his garden. I enquired as to whether or not he was on a meter and she said yes. I replied must have deep pockets. My point in mentioning this, is, if you are on a meter, can you still use the water? Remember Water Companies are there to make a profit.