How do you find out what water supply you are on?

[imark]

I'm in Lucan but I think my water isn't as hard as the Leixlip supply figures show. Is there a way to find out what supply you are on from the council based on your street address?

[imark]

My test kit arrived today and I was surprised to get readings ~40ppm. Seems I'm not served off Leixlip supply. Woohoo!