That's extremely low for energy and pretty low for a water meter.
Is that the charge for the energy you use or is that your monthly DD which may have been reduced because you have a credit balance)?
We are very careful with energy use, we use as much electricity on economy 7 as possible (washer, dishwasher done at night), avoid the tumble drier where possible, avoid use of standby), and yet for a similar size house we pay double that for 2-3 of us.
Our water is down to £22 a month now on a meter (usage is nearer £26 but we were in credit), but we couldn't get it much lower because of fixed charges