Wellington water guide

Is Wellington tap water chlorinated?

What Wellington’s multiple water sources and treatment plants mean for chlorine, local variation and your shower.

Water from a shower running over a person's shoulder

Quick answer

Yes, treated supplies serving Wellington use chlorine for disinfection. The exact residual at your tap can vary with the treatment plant, network location and current operating conditions.

What is in Wellington tap water?

Wellington’s regional supply uses several water sources and treatment plants. Published Wellington Water technical information for Wainuiomata says chlorine gas is used to disinfect filtered water and residual chlorine is monitored.

That Wainuiomata technical sheet lists a typical residual range of 0.5 to 1.0 mg/L, averaging 0.6 mg/L. Treat those as plant-specific published figures, not a promise for every Wellington address today.

Check your own supply: Use Wellington Water’s drinking-water information and current notices for your address.

What this means in the shower

Because supply sources and network conditions differ, start with current local information rather than a single city-wide number. For shower filtration, check what the product is tested to reduce, at what flow and for how long.

A shower filter treats water only at that shower outlet. It may reduce selected substances according to its media and test conditions, but it does not make hard water soft or replace official drinking-water advice.

Compare your city with the NZ water guide, or read how vitamin C reacts with free chlorine.

Common questions

Is Wellington tap water chlorinated?

Yes. Wellington’s treated regional supplies use chlorine for disinfection, although the level at an individual tap can vary.

Is Wellington water hard?

Hardness depends on the source supplying your area and is a separate measurement from chlorine. Check current supplier information if scale is your concern; a shower filter does not soften water.

Which shower filter should I choose?

Choose by shower fitting first. Universal keeps a compatible existing shower head; Nourish and Radiance replace a compatible handshower; Aura provides overhead coverage. Compare the full range before ordering.

Choose for your shower, not just your postcode.

Use the buying guide to compare fittings, published evidence, refill cycle and total running cost.

Read the buyer’s guideCompare SUHAE filters