I agree tap water can be bad, but not all and some well water can be good too. That is why I always say test it! We tend to get too fearful of things...I think there are problems with distilled water too, for example the condensor pipes are made from either stainless steel or aluminum! These metals will leach into the water, so the distilled water must be filtered too! Also there is evidence that distilled water leaches minerals from the body and leads to poor health. There are tons of studies proving that hard water is better than soft water and leads to better health.