Does ZeroWater Remove Chlorine?
Yes, ZeroWater filters are designed to remove chlorine from tap water, but the removal is a byproduct of the filtration media rather than the primary advertised claim. The system targets total dissolved solids (TDS), and because chlorine is a dissolved solid, it gets trapped along with other minerals and contaminants during the filtration process.
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How the Five-Stage Filtration Works
Each ZeroWater pitcher or dispenser passes water through five stages that collectively strip out chlorine, sediment, and dissolved particles.
- Stage 1: A coarse filter screen catches suspended particles and sediment.
- Stage 2: A foam distributor further reduces fine particles and channels water evenly.
- Stage 3: Activated carbon and oxidation-reduction alloy adsorb chlorine, organic compounds, and heavy metals.
- Stage 4: Dual comprehensive ion exchange resins target dissolved solids, including chlorine ions.
- Stage 5: A final ultra-fine screen removes any remaining suspended solids.
What to Expect in Practice
The amount of chlorine removed depends on the starting concentration in your municipal water supply, the age of the filter, and the total volume filtered. A new ZeroWater filter will reduce chlorine more effectively than a spent one. Once the filter's capacity is exhausted, chlorine removal drops significantly, which is why the company recommends replacing filters based on TDS readings or usage guidelines rather than time alone.
Limitations to Keep in Mind
ZeroWater is not a dedicated chlorine-specific filter like a whole-house carbon system. It reduces chlorine effectively at the point of use for drinking and cooking, but it does not protect plumbing, fixtures, or a full household's water supply. Chlorine removal also declines as the filter loads up with TDS, so regular testing with the included TDS meter helps you know when the filter is spent.