Tap Water Quality in Ashby Island, NSW
Postcode 2463 · Supplied by Sydney Water via Cascade
Quality Score
About Ashby Island
Ashby Island is a suburb of 18 residents in New South Wales (postcode 2463). The median age is 57. It falls within the Sydney Water area. Neighbouring suburbs include Woodford Island, Woodford, Ashby, Ashby Heights.
Most residents own outright (86%), while 0% own their home with a mortgage, while 0% rent. The median household income is $53,248 per year.
Tap water in Ashby Island is supplied by Sydney Water. The suburb receives water via the Cascade supply zone.
Water quality summary
Based on 2024-25 water quality reports, Ashby Island achieves a WaterScore of 9.7 out of 10, rated excellent overall. Water hardness measures 38.1 mg/L, classified as soft. This is gentle on appliances and skin, with minimal limescale buildup expected. The pH level is 7.7, which is within the ADWG guideline range of 6.5–8.5. The water is fluoridated at 1.04 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. Chlorine, used for disinfection, measures 1.06 mg/L — well within the ADWG guideline of 5 mg/L. Some residents may notice a slight taste, which can be reduced by refrigerating water or using a carbon filter. Total dissolved solids (TDS) measure 92.5 mg/L, considered low against the ADWG guideline of 600 mg/L. Turbidity is 0.17 NTU, indicating clear water, within the ADWG guideline of 5 NTU. E. coli was not detected in testing, meeting the ADWG standard for microbiological safety.
Compare with nearby suburbs: Woodford Island , Woodford , Ashby
Census Data
Suburb snapshot
Population
Median Age
Median Income
Owner-occupied
Recommended filters for Ashby Island
Products matched to your water profile
ZeroWater
2.8L 5-Stage Jug (PFAS + Fluoride + Lead, IAPMO Certified)
4.2 · 5,315 ratings on Amazon
Ideal for Ashby Island — removes fluoride (currently 1.04 mg/L).
iSpring
RCC7AK 6-Stage Under-Sink RO (with Alkaline Re-min)
4.6 · 13,756 ratings on Amazon
Ideal for Ashby Island — removes fluoride (currently 1.04 mg/L), removes chlorine taste and odour.
BRITA
Marella 2.4L Fridge Water Filter Jug (Maxtra+)
4.7 · 16,095 ratings on Amazon
Ideal for Ashby Island — removes chlorine taste and odour.
Comparison
How Ashby Island compares
Compared to New South Wales and national averages
| Metric | Ashby Island | NSW Avg | National Avg |
|---|---|---|---|
| Hardness | 38.1 mg/L | 45.9 mg/L | 85.1 mg/L |
| pH | 7.7 | 7.7 | 8.4 |
| Fluoride | 1.04 mg/L | 1 mg/L | 0.7 mg/L |
| Chlorine | 1.06 mg/L | — | — |
| Turbidity | 0.17 NTU | 0.2 NTU | 0.4 NTU |
| TDS | 92.5 mg/L | 116.3 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 |
|---|---|---|---|---|
| Iron | 0.016 | mg/L | < 0.3 | Good |
| Aluminium | 0.017 | mg/L | < 0.2 | Good |
| Manganese | 0.0031 | mg/L | < 0.1 | Good |
| Copper | 0.014 | mg/L | < 2 | Good |
| Zinc | 0.005 | mg/L | No limit | Measured |
| Ammonia | 0.001 | mg/L | No limit | Measured |
| Turbidity | 0.17 | NTU | < 5 | Good |
| Colour | 2 | HU | < 15 | Good |
| Dissolved Oxygen | 87.9 | % saturation | No limit | Measured |
| Total Dissolved Solids | 92.5 | mg/L | < 600 | Good |
| Sulfate | 0.9 | mg/L | < 500 | Good |
| Hardness | 38.1 | mg/L | < 200 | Good |
| pH | 7.7 | pH units | 6.5 – 8.5 | Normal |
| Temperature | 16.1 | degrees C | No limit | Measured |
| E. coli | 0 | orgs/100 mL | < 0 | Compliant |
| Free Chlorine | 1.06 | mg/L | < 5 | Good |
| Monochloramine | 0.07 | mg/L | < 3 | Good |
| Fluoride | 1.04 | mg/L | < 1.5 | Good |
| Trihalomethanes | 0.03 | mg/L | < 0.25 | Good |
| Ndma | 0.0001 | mg/L | No limit | Measured |
| Chloride | 0.004 | mg/L | < 250 | Good |
| Pfos Pfhxs | 0.0026 | µg/L | No limit | Measured |
| PFOA | 0.0001 | µg/L | < 0.56 | Good |
Safety
Safety assessment
Based on 23 parameters tested, all results fall within Australian Drinking Water Guidelines. E. coli was not detected, meeting the ADWG standard for microbiological safety.
Based on comparison with Australian Drinking Water Guidelines (ADWG)
Explained
What these numbers mean
Soft (38.1 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 7.7 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 1.04 mg/L. Within the recommended 0.6–1.1 mg/L range for dental health.
Chlorine
Disinfection
Chlorine measured at 1.06 mg/L, well within the ADWG guideline of 5 mg/L. Used for disinfection to keep water safe. May affect taste slightly — refrigerating water or using a carbon filter can help.
Learn more about these measurements in our water quality glossary — including Hardness , pH , Fluoride , and ADWG guidelines .
Advice
Practical tips for residents
Reduce Chlorine Taste
Ashby Island's chlorine level is 1.06 mg/L. An activated carbon jug filter or benchtop unit can noticeably reduce chlorine taste and odour from tap water.
Soft Water Advantage
Ashby Island's water is soft at 38.1 mg/L. You can use less soap and detergent, as it lathers easily with softer water.
Fluoride in Your Water
Fluoride measures 1.04 mg/L in Ashby Island. Australian guidelines allow up to 1.5 mg/L. This is added by utilities to support dental health in the community.
Get water quality alerts
We'll email you when Ashby Island's water data is updated.
FAQ
Frequently asked questions
Is tap water safe to drink in Ashby Island?
How hard is the water in Ashby Island?
What water utility supplies Ashby Island?
Does Ashby Island water have fluoride?
What is the water quality score for Ashby Island?
What is the population of Ashby Island?
Supplier
Water utility
- Utility
- Sydney Water
- Supply Zone
- Cascade
- Data Source
- Sydney Water — quarterly cascade q2 202425, quarterly cascade q3 202425, quarterly cascade q4 202425
Nearby
Nearby suburbs
Same water utility, similar water quality
Similar Quality
Suburbs with similar water quality
Suburbs scoring between 8.7 and 10.0
Utility reports average the grid — not your home
Ashby 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 Sydney
In-depth articles on the water supply that serves Ashby Island
Related
Explore more
Related pages for Ashby Island, NSW
Is tap water safe?
Safety assessment
Water hardness
38.1 mg/L
Best water filter
Filter recommendations
New South Wales water quality
State coverage
Sydney Water
Water utility
Compare with Woodford Island
Ashby Island vs Woodford Island
Compare with Woodford
Ashby Island vs Woodford
Compare with Ashby
Ashby Island vs Ashby
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 Sydney Water (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.