Tap Water Quality in Thevenard Island, WA
Postcode 6711 · Supplied by Water Corporation via North West
Quality Score
About Thevenard Island
Thevenard Island is a suburb in Western Australia, Australia (postcode 6711). It falls within the Water Corporation area. Neighbouring suburbs include Onslow, Barrow Island, Cane, Peedamulla.
Tap water in Thevenard Island is supplied by Water Corporation. The suburb receives water via the North West supply zone.
Water quality summary
Based on recent water quality reports, Thevenard Island achieves a WaterScore of 9.6 out of 10, rated excellent overall. Water hardness measures 54 mg/L, classified as soft. This is gentle on appliances and skin, with minimal limescale buildup expected. The pH level is 7.85, which is within the ADWG guideline range of 6.5–8.5. Fluoride levels are very low at 0.1 mg/L, indicating the water is not significantly fluoridated. Total dissolved solids (TDS) measure 157 mg/L, considered low 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: Onslow , Barrow Island , Cane
Recommended filters for Thevenard Island
Products matched to your water profile
BRITA
Marella 2.4L Fridge Water Filter Jug (Maxtra+)
4.7 · 16,095 ratings on Amazon
A reliable marella 2.4l fridge water filter jug (maxtra+) suitable for Thevenard Island's water profile.
ZeroWater
23-Cup Dispenser (incl. TDS Meter)
4.3 · 27,123 ratings on Amazon
A reliable 23-cup dispenser (incl. tds meter) suitable for Thevenard Island's water profile.
Purewell
8.5L Stainless Steel Gravity System
4.4 · 1,137 ratings on Amazon
A reliable 8.5l stainless steel gravity system suitable for Thevenard Island's water profile.
Comparison
How Thevenard Island compares
Compared to Western Australia and national averages
| Metric | Thevenard Island | WA Avg | National Avg |
|---|---|---|---|
| Hardness | 54 mg/L | 122.1 mg/L | 85.1 mg/L |
| pH | 7.85 | 8 | 8.4 |
| Fluoride | 0.1 mg/L | 0.8 mg/L | 0.7 mg/L |
| Turbidity | 0.1 NTU | 0.2 NTU | 0.4 NTU |
| TDS | 157 mg/L | 463.8 mg/L | 275.7 mg/L |
Full Results
Detailed water quality data
All values compared against Australian Drinking Water Guidelines (ADWG)
| Parameter | Value | Unit | ADWG Guideline | Status |
|---|---|---|---|---|
| Alkalinity | 49 | mg/L CaCO3 | No limit | Measured |
| Aluminium | 0.008 | mg/L | < 0.2 | Good |
| Chloride | 42 | mg/L | < 250 | Good |
| Hardness | 54 | mg/L CaCO3 | < 200 | Good |
| Iron | 0.009 | mg/L | < 0.3 | Good |
| Manganese | 0.005 | mg/L | < 0.1 | Good |
| pH | 7.85 | pH units | 6.5 – 8.5 | Normal |
| Sodium | 21 | mg/L | < 180 | Good |
| Sulfate | 0.15 | mg/L | < 500 | Good |
| Total Dissolved Solids | 157 | mg/L | < 600 | Good |
| Colour | 1 | HU | < 15 | Good |
| Turbidity | 0.1 | NTU | < 5 | Good |
| Fluoride | 0.1 | mg/L | < 1.5 | Good |
| Nitrate | 0.44 | mg/L | < 50 | Good |
| Trihalomethanes | 0.052 | 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
Soft (54 mg/L)
Water Hardness
Your water is classified as soft, which means minimal limescale buildup on fixtures and appliances. Soap and shampoo will lather easily, and you should notice no drying effects on skin or hair. Hot water systems and kettles are unlikely to suffer scale-related efficiency losses.
Normal Range
pH Level
pH of 7.85 is within the ideal range of 6.5–8.5. The ADWG recommends pH between 6.5 and 8.5 for drinking water.
Low fluoride
Fluoride
Fluoride at 0.1 mg/L. Below the recommended range.
Data unavailable
Disinfection
Chlorine data is not currently available for Thevenard Island.
Learn more about these measurements in our water quality glossary — including Hardness , pH , Fluoride , and ADWG guidelines .
Advice
Practical tips for residents
Soft Water Advantage
Thevenard Island's water is soft at 54 mg/L. You can use less soap and detergent, as it lathers easily with softer water.
Fluoride in Your Water
Fluoride measures 0.1 mg/L in Thevenard Island. Australian guidelines allow up to 1.5 mg/L. This is added by utilities to support dental health in the community.
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.
Get water quality alerts
We'll email you when Thevenard Island's water data is updated.
FAQ
Frequently asked questions
Is tap water safe to drink in Thevenard Island?
How hard is the water in Thevenard Island?
What water utility supplies Thevenard Island?
Does Thevenard Island water have fluoride?
What is the water quality score for Thevenard Island?
Supplier
Water utility
- Utility
- Water Corporation
- Supply Zone
- North West
- Data Source
- Water Corporation — WC North West Aesthetic Tables, WC North West Health Tables
Nearby
Nearby suburbs
Same water utility, similar water quality
Similar Quality
Suburbs with similar water quality
Suburbs scoring between 8.6 and 10.0
Utility reports average the grid — not your home
Thevenard Island'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 Thevenard Island
Related
Explore more
Related pages for Thevenard Island, WA
Is tap water safe?
Safety assessment
Water hardness
54 mg/L
Best water filter
Filter recommendations
Western Australia water quality
State coverage
Water Corporation
Water utility
Compare with Onslow
Thevenard Island vs Onslow
Compare with Barrow Island
Thevenard Island vs Barrow Island
Compare with Cane
Thevenard Island vs Cane
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 (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.