Lately I've seen several posts/emails about drinking more water and how it can save you money. Well, we live in west Texas and have always been told the tap water really isn't good for drinking. So we've been buying gallon jugs of spring water (about 74 cents each) without even bothering to try filtering, as we did in Florida.Also, lately, I've been seeing ads and reviews for the Zero water filter pitchers that are supposed to be better than any other filtering pitchers. So I thought "Ok, maybe we should try filtering again and see what it saves us." So I bought a Zerowater pitcher and it included a TDS (total dissolved solids) tester. This tester was supposed to read "000" (thus the name Zero water) on filtered tap water. You're supposed to replace the filter when it starts reading "006." Here is the graph that shows how long a filter should be expected to last.
So, guess what our tap water read on the TDS meter? 750! Unless, of course, the meter was faulty. So that means we can expect a filter to last us 8 gallons or less, according to the chart. A filter costs a minimum of $14, as far as I've found. So that's $1.75 a gallon, at least! And even after going through the filter, the water read "018" on the TDS meter.
So, for us, the Zero water filter is not worth it. Now, if you live where the TDS reading are "average" and you can get 25-40 gallons per filter, it might be worth it for you. Amazon has some pretty good reviews. But assuming we drink at least a gallon a day, we'd be spending about $53/mo on water. Buying the spring water, we're spending about $23/mo. Still more than I want to pay, but less than we would be paying to replace Zero Water filters.