Save carbon, water and money at the same time

This week I finally got the paperwork through confirming that the water meter I asked for has been installed. What made the most interesting reading is that I was going to have to pay GBP424 of water rates. The estimate from Thames Water is that I will have to pay GBP228 now that it is metered. There was no charge for the water meter itself, nor for it's installation; so if I use water as they predict, I'm GBP196 better off every year, which more than covers the extra cost of the green electricity.
Those of us who are environmentally conscious are sometimes labelled unrealistic, and sometimes labelled smug. This step proves that it is realistic to save water, carbon and money at the same time. As to smug - well, maybe a bit. But don't I have a right?