My usual tds is between 34 to 42 ppm and in the West Country we have the softest and highest priced water in the UK . my resin has lasted 1 week compared with 6 weeks normally. The culprit is my water supplier the tds is 121ppm. I rang the scientific team to find out why it has changed as we only have one reservoir supplying Plymouth. The guy on the phone said that it probably is to do with the fact we are sourcing our water from local rivers not the reservoir. The local reservoir just happens to be filled by rivers so I questioned which rivers. The answer is the Tamar which contains sea water as is joined to the sea I asked what difference there was in filtration and he said none. So surely the tds should be the same. This he could not answer so decided to send me the water source analysis and testing results which should show what impurities are left in the water. The river Tamar is where Devonport dockyard is placed and I wonder if this has anything to do with it. Surely this is a cost cutting measure from good old water companies making a fortune already. Has anyone else had an unusual jump in tds level?