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Auckland's tap water is treated and safe to drink by NZ standards. So do you actually need a water filtration system? It depends on what matters to you.
Watercare manages Auckland's water supply and treatment, ensuring it meets national drinking water standards.
Auckland Water Quality
Watercare treats Auckland's water supply to meet the NZ Drinking Water Standards. It is disinfected with chlorine (or chloramine in some areas) to kill bacteria. Fluoride is added in most areas for dental health.
While the water is safe, some people are sensitive to the taste or smell of chlorine. Others have concerns about trace contaminants, sediment from aging pipes, or simply want the best quality water for drinking and cooking. If you suspect a water leak or discolouration from old pipes, a qualified plumber can assess the supply before you decide on filtration.
Types of Water Filtration Systems
Under-Sink Filters
The most popular option for Auckland homes. A filter unit sits under your kitchen sink connected to a dedicated filtered water tap (or a three-way mixer tap). It removes chlorine, sediment, and depending on the filter type, heavy metals and other contaminants.
- Cost: $500 to $1,200 installed
- Filter replacement: Every 6 to 12 months, $50 to $150
- Best for: Improving drinking and cooking water quality
Whole House Filtration
Filters all water entering your home -- every tap, shower, and appliance gets filtered water. Removes sediment and chlorine from your entire supply.
- Cost: $1,500 to $4,000 installed
- Filter replacement: Every 6 to 12 months, $100 to $300
- Best for: People with skin sensitivities, eczema, or anyone who wants filtered water from every outlet
UV Sterilisation
Uses ultraviolet light to kill bacteria and viruses. Not common for Auckland mains water (which is already treated) but essential for properties on tank water or bore water.
- Cost: $800 to $2,000 installed
- Best for: Rural properties, rainwater tanks, bore water supplies
Benchtop and Jug Filters
The budget option. Brita jugs and benchtop units are affordable but have limitations -- smaller capacity, slower flow, and less effective filtration than plumbed-in systems.
Do You Need One?
Consider a filter if:
- You dislike the taste or smell of chlorine in your tap water
- You have old galvanised pipes that may add sediment or rust to your water -- consider pipe replacement as a long-term fix
- You spend money on bottled water (a filter pays for itself quickly)
- You have skin conditions that react to chlorine
- You are on tank water or bore water (UV sterilisation recommended)
You probably do not need one if:
- You are happy with the taste of your tap water
- Your home has modern pipes in good condition
- Budget is very tight (Auckland water is safe to drink without filtration)
Want to Improve Your Water Quality?
Water and Gas Worx supplies and installs water filtration systems across Auckland. We can recommend the right system for your needs and budget. See our pricing or check which areas we service.
If your home has older plumbing, a hot water system upgrade paired with filtration can make a big difference to water quality throughout your home.
Call 0800 322 322 or email service@wgw.co.nz
Frequently Asked Questions
Is Auckland tap water safe to drink without a filter?
Yes. Auckland's tap water is treated by Watercare and meets NZ Drinking Water Standards. A filter is not a safety necessity -- it is a preference for people who want to improve taste, remove chlorine, or reduce trace contaminants.
How much does an under-sink water filter cost to install?
An under-sink water filtration system typically costs $500 to $1,200 installed, depending on the filter type and whether you want a dedicated tap or a three-way mixer. Ongoing filter replacements cost $50 to $150 every 6 to 12 months.
What is the difference between under-sink and whole house filtration?
An under-sink filter treats water at one outlet -- usually the kitchen tap for drinking and cooking. A whole house system filters all water entering your home, so every tap, shower, and appliance gets filtered water. Whole house systems are best for people with skin sensitivities or who want chlorine-free water throughout.