How Can We Remove Impurities From Water My Water Taste

how can we remove impurities from water my water taste is also wierd when i ddboil it its taste become further wierd one day i drink to much bottles of water i feel vomit and pain in my kidney i cannot afford any kind of filter so tell me easiest and inexpensive way. i have rashes,darkcircles,pimples,dark spots on my face i do every thing to get cure from it but in vain. please tell me effective home remedy for it