Been living with terrible NM water for far too long. I don't drink the water. I don't cook with it. I don't brush my teeth with it. The overly high "acceptable" arsenic levels disturb me. Typically my filter system is a permanent spin down sediment filter followed by a 0.5 micron filter (one that removes guardia cysts and some pesticides) because I live in a farming community on tested well water. For drinking/cooking water, I buy RO filtered water at 25¢ per gallon. I have four 3 gallon jugs for us and four 1 gallon jugs for the dog's water. When we get down to 1 jug, the empties go along with us to town and get filled at one of the MANY water dispensers in town.
Since the water here is so hard (lime/calcium? It eats metal), I only use liquid soaps & detergents. I add a 1/2 cup of baking soda with every laundry load to the HE washer to try to keep it clean between monthly deep clean cycles. I just toss it in after doing a load. It keeps the washer fresh and the baking soda is ready to do a load of laundry.