With water being heavy to carry and impossible to make ''lighter'' in pack other than not carrying it, and also essential to maintain life so it must be carried or sourced from somewhere on route, i was wondering where people sourced their water from while travelling through country (in UK). It is one of the few items that cannot be made lighter if trying to lighten pack weight. If there are no local supplies in the way of tap water from garages/shops/houses/camp sites/etc: etc: where do you source from. Personally, against the advice of many people i have taken water from many rivers, Wye/Severn/Vyrnwy/Irfon/many tributaries like Teme/Ithon/Lugg/Clun/Onny Etc:/many streams and lakes in the Welsh mountains, i just filter through one of those cloth jam-making bags and boil it, i have never added purifiers, i know it's not recommended but i have never suffered an illness through it though am aware of the risks, sometimes i have taken water from those livestock water troughs (when not locked by farmer) that are supplied directly with running water by way of those blue plastic water pipes, i have presumed (though in honestly do not know) that those blue water pipes carrying water to trough supply clean tap water. By choice i have used springs but they are not always available. Only once have i suffered any consequences in many years which was from a stream in Cannock Chase (upstream of Seven Springs) when for a few days my teeth felt peculiarly metal-like and all on edge, i put it down (ignorantly) to the high concentration of conifers affecting the water. I know my sourcing of water is not generally advised, what do you do when you cannot source it from habitation/taps etc:.