Chlorine vs Chloramine: What’s Actually in Your Water Supply?

Chlorine gets most of the attention when people talk about tap water taste and smell, but chloramine, a related but different disinfectant, is used in some water supplies too.

What Chlorine Does

Chlorine is a fast-acting disinfectant that breaks down relatively quickly, which is part of why its taste and smell can vary noticeably depending on how recently the network was treated.

What Chloramine Is

Chloramine is formed by combining chlorine with ammonia, creating a more stable disinfectant that lasts longer through the distribution network, which some water authorities prefer for more consistent protection over longer pipe runs.

Why the Difference Matters for Filtration

Standard carbon filtration handles chlorine very effectively, but chloramine is more chemically stable and typically requires a longer contact time or a catalytic carbon media to reduce it effectively.

Checking What’s in Your Supply

Your local water authority’s water quality reporting will confirm which disinfectant is used in your area, which is useful information when choosing a carbon filter rated for the right one.

Water Quality Considerations for Chlorine vs Chloramine: What’s Actually in Your Water Supply?

When Victorian households think about chlorine vs chloramine: what’s actually in your water supply?, it helps to understand what’s actually being targeted at the tap. Municipal disinfection processes (chlorination and, in some areas, chloramination) are essential for public health, but they can leave taste, odour, and by-product residues that a well-specified filter is designed to reduce. Beyond disinfection residuals, town water can also carry trace heavy metals from ageing plumbing, sediment after mains work, and — increasingly relevant nationally — PFAS (“forever chemicals”) that have been detected in some catchments and groundwater sources around Australia.

A correctly sized activated carbon or reverse osmosis system, matched to your household’s actual water chemistry, addresses these concerns far more reliably than boiling (which does nothing for PFAS or dissolved chemicals) or jug filters (only rated for very light duty use). For households with specific sensitivities — young children, pregnancy, skin conditions, or immune concerns — we recommend a system independently tested to NSF/ANSI standards for the specific contaminant reduction claim you care about, rather than relying on marketing claims alone.

Verified Standards & Further Reading

For homeowners who want to verify the certification claims made in this article, we encourage you to check the primary sources directly rather than taking any supplier’s word for it (including ours):

• Search any plumbing product’s WaterMark certification status directly on the Australian Building Codes Board’s official WaterMark product database.
• Verify NSF/ANSI certified water treatment products and the specific standard they are tested against via the official NSF certified product listings.
• Read the current Australian Drinking Water Guidelines published by the National Health and Medical Research Council for the official national standards on drinking water quality.

All AquaCo filtration systems supplied and installed by Vic Water Filters carry WaterMark Licence No. 23448 and are independently tested to the relevant NSF/ANSI standards for their stated contaminant reduction claims, including PFAS/PFOA and PFOS reduction where specified on the individual product datasheet.