You can buy special shampoo and conditioner for hard and soft water areas. Try the brand AreaH20 at lookfantastic.com or other places online.
Remedies for Hair Damaged by Perm
Washing Machine Fills But Won't Wash?
Buying a Water Softener?
Hard Water Leaving Laundry Dingy and Gray?
Cleaning Hard Water Stains in a Washing Machine Drum?
Using Leftover Hair Dye?