Tap Water Quality in Green Island, QLD
Postcode 4871 · Supplied by Cairns Council via Cairns System
About Green Island
Green Island is a suburb of 20 residents in Queensland (postcode 4871). The median age is 34. It falls within the Cairns Council area.
Most residents own their home with a mortgage (0%), while 0% own outright, while 0% rent. The median household income is $90,948 per year. The top countries of birth for residents are New Zealand (67%).
Tap water in Green Island is supplied by Cairns Council. The suburb receives water via the Cairns System supply zone.
Water quality summary
WaterScore does not currently have suburb-level laboratory readings for Green Island. Supplier and supply-zone details are shown where available, but there is not enough local data yet to calculate a WaterScore rating or compare against Australian Drinking Water Guidelines.
Census Data
Suburb snapshot
Population
Median Age
Median Income
What To Check
Test the things utility gaps can miss
Lead and copper
Older pipes and fittings can add metals after treatment.
Bacteria
Roof tanks, filters and stagnant plumbing can change tap safety.
Chlorine
Residual disinfectant affects taste and varies by distance from treatment.
Hardness
Scale risk depends on the water actually reaching your home.
Safety
Safety assessment
Water quality testing data is not currently available for this suburb. Without laboratory results to compare against Australian Drinking Water Guidelines, an overall safety assessment cannot be provided at this time. Check back as more data becomes available from your local water utility.
Based on comparison with Australian Drinking Water Guidelines (ADWG)
Explained
What these numbers mean
Data unavailable
Water Hardness
Hardness data is not currently available for this suburb.
Data unavailable
pH Level
pH data is not currently available for Green Island.
Data unavailable
Fluoride
Fluoride data is not currently available for Green Island.
Data unavailable
Disinfection
Chlorine data is not currently available for Green Island.
Learn more about these measurements in our water quality glossary — including Hardness , pH , Fluoride , and ADWG guidelines .
Advice
Practical tips for residents
Flush After Absence
If your home has been unoccupied for several days, run the kitchen tap for 30 seconds before drinking. This clears stale water that has been sitting in pipes.
Use Cold Water for Cooking
Always draw cold water for cooking and drinking. Hot water systems can leach metals from pipes and fittings, and cold water has less dissolved material overall.
Maintain Your Filter
If you use a water filter jug or benchtop system, replace the cartridge according to the manufacturer's schedule. An old filter can harbour bacteria and reduce performance.
Get water quality alerts
We'll email you when Green Island's water data is updated.
FAQ
Frequently asked questions
Is tap water safe to drink in Green Island?
How hard is the water in Green Island?
What water utility supplies Green Island?
Does Green Island water have fluoride?
What is the population of Green Island?
Supplier
Water utility
- Utility
- Cairns Council
- Supply Zone
- Cairns System
Utility reports average the grid — not your home
Green Island does not have suburb-level lab readings yet, and old pipes, roof tanks, and ageing plumbing can add lead, copper or bacteria before the water reaches your tap. These won't show up in your utility report.
Check your own tap before buying a filter or assuming the suburb average matches your home.
Tetra
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Heavy Metals
Drinking Water Test Kit (Lead, Copper, Iron, Mercury)
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20 tests. Detects lead, copper, iron, mercury — the things utility reports miss. Mobile-app results, EPA-standard thresholds.
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Guides for Cairns
In-depth articles on the water supply that serves Green Island
Related
Explore more
Related pages for Green Island, QLD
Disclaimer: The information on this page is for general informational purposes only and does not constitute medical advice, health recommendations, or professional guidance. WaterScore does not currently have suburb-level laboratory readings for Green Island; supplier and suburb details are shown for coverage context — it may not reflect real-time water quality at your tap. Actual water quality can vary due to local plumbing, seasonal changes, and distance from the treatment plant. For specific health concerns, consult a qualified health professional. For the most current water quality information, contact your local water utility directly. See our Terms of Use.