I was a bit envious of a wc friend of mine who's water comes out the tap at 42 ppm, My own water is 57. I was in Barmouth over the weekend and I had my tds meter in the car. I tested the water in my daughters caravan and I could not believe it, it comes out the tap at 20 ppm. I tested it twice to make sure. Thought my meter was playing up so tested my own water when I got home. It still reads 57. Has anyone else got water this pure? You could do commercial work with the tap water in Barmouth. Dai.