Tap Water Quality in Joondalup, WA
Postcode 6027 · Supplied by Water Corporation via Wanneroo
Quality Score
About Joondalup
Joondalup is a suburb of 9,193 residents in Western Australia (postcode 6027). The median age is 39. It falls within the Water Corporation area. Neighbouring suburbs include Iluka, Kinross, Currambine, Beldon.
Most residents rent (41%), while 33% own their home with a mortgage, while 24% own outright. The median household income is $87,776 per year. The top countries of birth for residents are United Kingdom (41%), South Africa (8%), and New Zealand (7%).
Tap water in Joondalup is supplied by Water Corporation. The suburb receives water via the Wanneroo supply zone.
Water quality summary
Based on 2024-25 water quality reports, Joondalup achieves a WaterScore of 9.2 out of 10, rated excellent overall. Water hardness measures 125 mg/L, classified as hard. Residents may notice limescale buildup on appliances and fixtures. The pH level is 7.54, which is within the ADWG guideline range of 6.5–8.5. The water is fluoridated at 0.8 mg/L, within the recommended range of 0.6–1.1 mg/L for dental health, well under the ADWG maximum of 1.5 mg/L. Total dissolved solids (TDS) measure 480 mg/L, considered moderate against the ADWG guideline of 600 mg/L. Turbidity is 0.1 NTU, indicating clear water, within the ADWG guideline of 5 NTU.
Compare with nearby suburbs: Iluka , Kinross , Currambine
Census Data
Suburb snapshot
Population
Median Age
Median Income
Owner-occupied
125/200 mg/L
25% above Western Australia avg
56% above national avg
Recommended filters for Joondalup
Products matched to your water profile
iSpring
RCC7AK 6-Stage Under-Sink RO (with Alkaline Re-min)
4.6 · 13,756 ratings on Amazon
Ideal for Joondalup — reduces hardness from 125 mg/L.
AO Smith
Salt-Free Whole House Descaler (6yr / 600,000 Gal)
4.3 · 1,517 ratings on Amazon
Ideal for Joondalup — helps reduce limescale buildup from hard water (125 mg/L) without removing hardness minerals.
Purewell
8.5L Stainless Steel Gravity System
4.4 · 1,137 ratings on Amazon
A reliable 8.5l stainless steel gravity system suitable for Joondalup's water profile.
Comparison
How Joondalup compares
Compared to Western Australia and national averages
| Metric | Joondalup | WA Avg | National Avg |
|---|---|---|---|
| Hardness | 125 mg/L | 99.8 mg/L | 80.3 mg/L |
| pH | 7.54 | 7.9 | 7.8 |
| Fluoride | 0.8 mg/L | 0.7 mg/L | 0.7 mg/L |
| Turbidity | 0.1 NTU | 0.2 NTU | 0.4 NTU |
| TDS | 480 mg/L | 434.2 mg/L | 267.4 mg/L |
Full Results
Detailed water quality data
All values compared against Australian Drinking Water Guidelines (ADWG)
| Parameter | Value | Unit | ADWG Guideline | Status |
|---|---|---|---|---|
| Alkalinity | 108 | mg/L CaCO3 | No limit | Measured |
| Aluminium | 0.01 | mg/L | < 0.2 | Good |
| Chloride | 160 | mg/L | < 250 | Good |
| Hardness | 125 | mg/L CaCO3 | < 200 | Good |
| Iron | 0.016 | mg/L | < 0.3 | Good |
| Manganese | 0.004 | mg/L | < 0.1 | Good |
| pH | 7.54 | pH units | 6.5 – 8.5 | Normal |
| Sodium | 93 | mg/L | < 180 | Good |
| Sulfate | 23 | mg/L | < 500 | Good |
| Total Dissolved Solids | 480 | mg/L | < 600 | Good |
| Colour | 1 | HU | < 15 | Good |
| Turbidity | 0.1 | NTU | < 5 | Good |
| Fluoride | 0.8 | mg/L | < 1.5 | Good |
| Nitrate | 3.1 | mg/L | < 50 | Good |
| Trihalomethanes | 0.106 | mg/L | < 0.25 | Good |
Safety
Safety assessment
Based on 15 parameters tested, all results fall within Australian Drinking Water Guidelines.
Based on comparison with Australian Drinking Water Guidelines (ADWG)
Explained
What these numbers mean
Hard (125 mg/L)
Water Hardness
Your water is classified as hard. Expect noticeable limescale on heating elements, showerheads, and taps. Soap and shampoo may not lather as freely, requiring more product. Some residents report drier skin or hair. Periodic descaling of kettles and hot water systems is recommended to maintain efficiency.
Normal Range
pH Level
pH of 7.54 is within the ideal range of 6.5–8.5. The ADWG recommends pH between 6.5 and 8.5 for drinking water.
Fluoridated
Fluoride
Fluoride at 0.8 mg/L. Within the recommended 0.6–1.1 mg/L range for dental health.
Data unavailable
Disinfection
Chlorine data is not currently available for Joondalup.
Learn more about these measurements in our water quality glossary — including Hardness , pH , Fluoride , and ADWG guidelines .
Advice
Practical tips for residents
Watch for Limescale
Joondalup has hard water at 125 mg/L. Wipe taps and showerheads periodically with vinegar to prevent limescale buildup on fixtures.
Fluoride in Your Water
Fluoride measures 0.8 mg/L in Joondalup. Australian guidelines allow up to 1.5 mg/L. This is added by utilities to support dental health in the community.
Consider a Filter for TDS
Total dissolved solids measure 480 mg/L. A reverse osmosis filter can reduce dissolved minerals if you prefer a cleaner taste in drinking water.
Get water quality alerts
We'll email you when Joondalup's water data is updated.
FAQ
Frequently asked questions
Is tap water safe to drink in Joondalup?
How hard is the water in Joondalup?
What water utility supplies Joondalup?
Does Joondalup water have fluoride?
What is the water quality score for Joondalup?
What is the population of Joondalup?
Supplier
Water utility
- Utility
- Water Corporation
- Supply Zone
- Wanneroo
- Data Source
- Water Corporation — WC Perth Aesthetic Tables 2024 25, WC Perth Health Tables 2024 25
Nearby
Nearby suburbs
Same water utility, similar water quality
Similar Quality
Suburbs with similar water quality
Suburbs scoring between 8.2 and 10.0
Utility reports average the grid — not your home
Joondalup's water meets ADWG standards at the source, but 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
EasyStrips 6-in-1 Water Test (100 strips)
4.6 · 8,650 ratings on Amazon
Tests 6 parameters in 60 seconds: hardness, chlorine, pH, nitrate, nitrite, alkalinity. Cheapest way to verify your utility data.
Test my tap →Sponsored Amazon link. Check Amazon for current price and availability.
Heavy Metals
Drinking Water Test Kit (Lead, Copper, Iron, Mercury)
4.2 · 250 ratings on Amazon
20 tests. Detects lead, copper, iron, mercury — the things utility reports miss. Mobile-app results, EPA-standard thresholds.
Check metals kit →Sponsored Amazon link. Check Amazon for current price and availability.
Guides for Perth and WA
In-depth articles on the water supply that serves Joondalup
Cite
Cite this page
Free to quote and reuse with a credit to WaterScore and a link to this page. Journalists and researchers can find key figures and contacts on our press and data page.
WaterScore. (2026). Tap water quality in Joondalup, WA [Data set]. Compiled from Water Corporation data (2024-25 annual report). https://waterscore.com.au/water-quality/joondalup-wa/
Embed
Add Joondalup, WA water data to your website
For plumbers, filter suppliers, cafés and real estate agents. Paste this code into your page to show the badge below, which links back to this report.
Related
Explore more
Related pages for Joondalup, WA
Is tap water safe?
Safety assessment
Water hardness
125 mg/L
Best water filter
Filter recommendations
Western Australia water quality
State coverage
Water Corporation
Water utility
Compare with Iluka
Joondalup vs Iluka
Compare with Kinross
Joondalup vs Kinross
Compare with Mullaloo
Joondalup vs Mullaloo
Disclaimer: The information on this page is for general informational purposes only and does not constitute medical advice, health recommendations, or professional guidance. Water quality data is sourced from Water Corporation (2024-25 annual report) and reflects conditions at the time of utility testing — 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.