How long does a Zero Water filter last?

ZeroWater filters are 5 stage water filters that use ion exchange technology—as opposed to most other kitchen water filters that only use activated carbon to absorb contaminants.

Ion exchange for water purification works by running water through beads of resin that have been loaded with mineral ions (usually sodium). These charged ions swap places with unwanted contaminant ions in the water. The resin beads absorb then contaminant ions as the purified water passes through.

Although this may sound a little complex, we can just think of it as replacing some undesirable contaminants (like concentrations of certain minerals) with a more desirable solution.

Softening hard water, through lowering concentrations of calcium and magnesium, is one common use of ion exchange for water purification.

How Long Do ZeroWater Filters Actually Last?

So we know that Zerowater filters use ion exchange to reduce the TDS in our drinking water. Sounds great. But a big part of deciding whether to invest in a water filter is getting an estimate of costs down the road.

The biggest question is usually: how often will I need to replace my filter? Switching out an old filter for a new one once in a while seems manageable, but doing it too often can really make the costs add up.

Unfortunately, there’s no single answer to this question, as frequency of filter change will depend on how hard the filter is working (the amount of dissolved solids it’s filtering) and how often it is used (total amount of water filtered over time).

Most Zerowater filters last somewhere between 2-4 months.

According to Zerowater, each filter removes about 18,000 milligrams of dissolved solids from water.

Zero Water Pitcher

Total Dissolved Solids – What are ZeroWater Filters Removing from Drinking Water?

Zerowater filters work to reduce the Total Dissolved Solids (TDS), which is one potential measure of water quality or cleanliness. TDS is typically measured in parts per million (ppm), and refers to all the inorganic substances that are suspended in water.

In fact, Zerowater jugs, pitchers and dispensers typically come with a TDS meter that you can dip into your filtered water to measure the effectiveness of the filter.

Zerowater claims that their filters can remove almost all (99.6%) of the dissolved solids impurities in your water. And they give you a meter to prove it!

What are some examples of total dissolved solids? Erosion of old piping might lead to an increase of TDS. Similarly, runoff of pesticides and fertilizers by agricultural operations can increase the TDS in surrounding groundwater.

Zerowater filters also remove lead up to U.S. EPA standards, which allow a maximum of 15 parts per billion (ppb) in drinkable tap water.

ZeroWater Filters – Benefits

If you live in an area with tap water on the low end of the spectrum for dissolved solids, in the 2-50 ppm range, you’ll get more than 40 gallons out of your filter.

However, if you live in an area with a high amount of dissolved solids in your water, in the 200-300 ppm range, you might only get 15-25 gallons of filtered water before you’ll need a new filter.

One nice benefit of having the TDS meter is that you can measure the dissolved solids of your unfiltered tap water, to get a sense of how many dissolved solids your filter is absorbing.

Another positive is that Zerowater offers a recycling program for its filters. Instead of simply throwing out an old filter, sending them back to the manufacturer to be recycled nets you a 50% discount on future filter purchases.

For every 2 filters recycled, you receive a coupon code for their website worth $10, which is roughly the price of a new filter. A great way to reduce your environmental footprint and save some money at the same time.

Summary – ZeroWater Filter Life

Ultimately, the shelf life of a Zerowater filter will depend on the amount of dissolved solids that it’s filtering out, and how often you use it. For most Zerowater filter users, a filter will last somewhere between 2-4 months, but precise times will vary. Happy filtering!