Premier Water Softeners In Spokane. Salt Of The Earth is located in Spokane Valley, WA, and we are a family owned company that has been providing water softening products to the surrounding areas since 1980. We provide all makes and models of water softeners, and want to give you a free service call today. Products and services we offer include: • Softeners & filters • Iron & nitrate removal • Drinking water systems • Premium salt products • Free water tests & estimates • Lifetime warranty We'll test your water and give you a free estimate based on the treatment systems best suited to your needs. This includes water softener and conditioning systems for a variety of water aliments including iron, hydrogen sulfide, bacteria, and more. We accept Visa & MasterCard. Call Salt Of The Earth today and get your free service call.