How Long Do ZeroWater Filters Last? (Explanation & FAQs)

ZeroWater products are becoming more and more popular in households of all sizes. The ZeroWater filter uses ion exchange technology to absorb contaminants in your water by up to 99.6% and produce pure water. It simplifies the water purification process and gives you complete control over the water you drink.

Over its life, a ZeroWater filter removes approximately 18,000 mg of dissolved solids – an excellent filtration capacity. So how long do ZeroWater filters last? 

The truth is how long this filter will last depends on many factors. However, this article gives you valuable information on ZeroWater Filters lifespan and the factors affecting its use time.

How Long Do ZeroWater Filters Last?

A standard ZeroWater filter lasts 3-5 months, equating to more than 40 gallons of water with low total dissolved solids (TDS of 50 or less) or 8 gallons or less of water with high dissolved solids (TDS of 401 or more).

From the data, you can realize that the ZeroWater filter usage time is not fixed and depends on your specific water condition. Among the many water factors, total dissolved solids (TDS) are the most critical metric that directly affects how long your ZeroWater filter can last.

Total dissolved solids are the total amount of non-organic impurities in a given water sample that affect the quality and taste of water. ZeroWater implements a 5-stage water purification mechanism. With this deep filtration process, you get water of the same high quality as reverse osmosis and distillation:

  • Stage 1: Pre-filtration to remove all solids present in the water (excluding dissolved substances such as ice)
  • Stage 2: Remove other suspended solids
  • Stage 3: Reduction of alloys, activated carbons, chloramines, chlorine, and pesticides by several layers of oxidation.
  • Stage 4: Exchange ions through a specialized resin to separate water and dissolved solids. In addition, this is also a step to remove inorganic chemicals such as fluoride.
  • Stage 5: Remove the remains of suspended solids through a non-woven coating and delicate screen.

Although it sounds complicated, it is like replacing some unwanted contaminant with a more desirable solution. For example, ZeroWater removes lead according to US EPA standards (up to 15 parts per billion ppb) in potable tap water. 

However, after ZeroWater filters remove dissolved solids from your water, they gradually lose their filtering ability. Therefore, the higher the total dissolved solids in the water, the shorter the life of the ZeroWater filter. 

Besides the quality of your water source, your ZeroWater filter lifespan depends on your water usage.

  • If you refill the tank once a day and the water quality is not too bad, the Zero Water filter can last several months.
  • If you refill your water several times a day with poor water quality, you may need to change the filter monthly.

After you use up its capacity, you’ll need to replace a filter.

Comparison Chart Of ZeroWater Filter Using Time

After understanding how TDS affects ZeroWater filters, below is a summary of the ZeroWater filter lifespan by the amount of filtered water and TDS. You can use this to calculate how long your ZeroWater filters last.

TDS in your waterImpurities LevelDescriptionGallons of water per filter
000-001Equal to FDA Definitions of purified bottled waterNo known areasN/A
002-050LowOccurring in only a few areas with harmful impurities.40 Gallons or more
051-200AverageThe majority of water in the U.S.25-40 Gallons
201-300HighSlightly shorter filter life15-25 Gallons
301-400Very HighSignificantly shorter filter life8-15 Gallons
401+ExtremeVery short filter life at 000 water T.D.S.8 Gallons or less

However, remember that the number of dissolved solids in the same water source can change over time. Therefore, you should use the TDS meter to measure and update your current total dissolved solids in your water—dissolved solids measurement in ppm (parts per million). 

To do that, you can dip the TDS meter in water and know how many dissolved solids your filter is absorbing.

  • If your living area has tap water with the lowest end of the dissolved solids spectrum (in the 2-50 ppm range), you’ll get more than 40 gallons from your filter.
  • If you live in an area with high levels of dissolved solids in the water, in the 200-300 ppm range, you should get 15-25 gallons of filtered water before you need a new filter.

Fortunately, most ZeroWater filters usually come with a TDS meter by default. After filtering the water, the device displays “000”, showing that the 5-step process is still working fine.

Frequently Asked Questions

When Do You Need To Replace Your ZeroWater Filter?

Once you’ve learned about the lifespan of your ZeroWater filter, you’re probably wondering what significant signs for timely filter replacement are. Here are our recommendations:

  • Sudden change in water taste (fishy or sour): Your filter may be currently filled with accumulated dirt. In this case, you should change your ZeroWater filter immediately.
  • TDS meter reading exceeds “006”: ZeroWater recommends that you change the ZeroWater filter when the Total Dissolved Solids reading reaches 6. So read the number displayed on the machine’s TDS meter after each filtration to assess the filtered water quality. For example, if the meter shows “006”, consider replacing the filter. Some new generation filters have an indicator light that reminds you when to change the ZeroWater filter.

How Much Does It Cost To Cover ZeroWater Filter’s Lifecycle?

An essential part of deciding whether to invest in a water purifier is a cost estimate. Switching an old filter to a new one from time to time may seem manageable, but doing it too often can add to the cost. Let’s see the total cost of using ZeroWater filters:

  • New ZeroWater pitchers start at $39.99: If your TDS count is low, you can get 40 gallons of water from a filter, about $18, which is about $0.45 per gallon.
  • Replacement filters cost about $13.25: However, ZeroWater applies a recycling program to old filters. After sending your ZeroWater filter back to the manufacturer for recycling, you’ll get a 50% discount on future filter purchases. For every 2 filters recycled, you will receive a coupon code for their website worth $10, roughly the price of a new filter.

Instead of simply throwing away an old filter, this is a great way to save some of your money and reduce your impact on the environment.


How long ZeroWater filters last depends on the number of dissolved solids it filters and the total water filtered over time. The higher the TDS value, the less filtered water will be, and the sooner you need to replace the filter. Most ZeroWater filters have a lifespan of 2-4 months, equal to 8-40 gallons.

To ensure the filter is in good condition throughout its life, you should refer to the ZeroWater TDS table in the article and familiarize yourself with the numbers involved. It only takes minimal effort to master your safety.

Follow our simple recommendations and pay close attention to any suspicious changes in your Water; you can let your ZeroWater filter work better and last longer.