We've all had letters from anglian water about dates for flushing of the water mains in our various streets. It warns quality can be affected on other dates as well, if streets nearby are flushed. Im not a great producer as Im fairly part time, but i better get some done in advance. Thing is with ours, its already really high tds, around 500 odd, so i hope the flushing dont make it much higher, maybe possibly improve it after a while?