Tap Water Quality in Mount Cottrell, VIC
Postcode 3024 · Supplied by Greater Western Water via Rockbank
Quality Score
About Mount Cottrell
Mount Cottrell is a suburb of 496 residents in Victoria (postcode 3024). The median age is 41. It falls within the Greater Western Water area. Neighbouring suburbs include Tarneit, Fieldstone, Strathtulloh, Eynesbury.
Most residents own outright (49%), while 26% rent, while 20% own their home with a mortgage. The median household income is $80,184 per year. The top countries of birth for residents are Lebanon (16%), India (9%), and United Kingdom (8%).
Tap water in Mount Cottrell is supplied by Greater Western Water. The suburb receives water via the Rockbank supply zone.
Water quality summary
Based on 2023-24 water quality reports, Mount Cottrell achieves a WaterScore of 9.5 out of 10, rated excellent overall. Water hardness measures 15 mg/L, classified as soft. This is gentle on appliances and skin, with minimal limescale buildup expected. The pH level is 7.4, which is within the ADWG guideline range of 6.5–8.5. The water is fluoridated at 0.78 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 0.98 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. Turbidity is 1.5 NTU, 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: Tarneit , Fieldstone , Strathtulloh
Census Data
Suburb snapshot
Population
Median Age
Median Income
Owner-occupied
Recommended filters for Mount Cottrell
Products matched to your water profile
BRITA
Marella 2.4L Fridge Water Filter Jug (Maxtra+)
4.7 · 16,095 ratings on Amazon
Ideal for Mount Cottrell — removes chlorine taste and odour.
ZeroWater
23-Cup Dispenser (incl. TDS Meter)
4.3 · 27,123 ratings on Amazon
A reliable 23-cup dispenser (incl. tds meter) suitable for Mount Cottrell's water profile.
Purewell
8.5L Stainless Steel Gravity System
4.4 · 1,137 ratings on Amazon
Ideal for Mount Cottrell — removes chlorine taste and odour.
Comparison
How Mount Cottrell compares
Compared to Victoria and national averages
| Metric | Mount Cottrell | VIC Avg | National Avg |
|---|---|---|---|
| Hardness | 15 mg/L | 28 mg/L | 85.3 mg/L |
| pH | 7.4 | 7.4 | 7.8 |
| Fluoride | 0.78 mg/L | 0.7 mg/L | 0.7 mg/L |
| Chlorine | 0.98 mg/L | — | — |
| Turbidity | 1.5 NTU | 1.8 NTU | 0.4 NTU |
| TDS | — | — | 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 | 12 | mg/L CaCO3 | No limit | Measured |
| Aluminium | 0.02 | mg/L | < 0.2 | Good |
| Free Chlorine | 0.98 | mg/L | < 5 | Good |
| Total Chlorine | 1.15 | mg/L | < 5 | Good |
| Colour | 2 | HU | < 15 | Good |
| E. coli | 0 | MPN/100mL | < 0 | Compliant |
| Electrical Conductivity | 71 | No limit | Measured | |
| Fluoride | 0.78 | mg/L | < 1.5 | Good |
| Hardness | 15 | mg/L CaCO3 | < 200 | Good |
| Iron | 0.08 | mg/L | < 0.3 | Good |
| Manganese | 0.004 | mg/L | < 0.1 | Good |
| pH | 7.4 | pH units | 6.5 – 8.5 | Normal |
| Sodium | 5.3 | mg/L | < 180 | Good |
| Trihalomethanes | 0.018 | mg/L | < 0.25 | Good |
| Turbidity | 1.5 | NTU | < 5 | Good |
Safety
Safety assessment
Based on 15 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 (15 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 7.4 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 0.78 mg/L. Within the recommended 0.6–1.1 mg/L range for dental health.
Chlorine
Disinfection
Chlorine measured at 0.98 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
Chlorine Levels Are Low
Chlorine in Mount Cottrell measures 0.98 mg/L, which is low. Filling a jug and letting it stand for 30 minutes will reduce any residual taste.
Soft Water Advantage
Mount Cottrell's water is soft at 15 mg/L. You can use less soap and detergent, as it lathers easily with softer water.
Fluoride in Your Water
Fluoride measures 0.78 mg/L in Mount Cottrell. Australian guidelines allow up to 1.5 mg/L. This is added by utilities to support dental health in the community.
Sediment Filtration
Turbidity is 1.5 NTU in Mount Cottrell. A sediment pre-filter on your main line can help reduce fine particles and improve water clarity at the tap.
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FAQ
Frequently asked questions
Is tap water safe to drink in Mount Cottrell?
How hard is the water in Mount Cottrell?
What water utility supplies Mount Cottrell?
Does Mount Cottrell water have fluoride?
What is the water quality score for Mount Cottrell?
What is the population of Mount Cottrell?
Supplier
Water utility
- Utility
- Greater Western Water
- Supply Zone
- Rockbank
- Data Source
- Greater Western Water — GWW Annual Water Quality Report 2023 24
Nearby
Nearby suburbs
Same water utility, similar water quality
Similar Quality
Suburbs with similar water quality
Suburbs scoring between 8.5 and 10.0
Utility reports average the grid — not your home
Mount Cottrell'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 Melbourne
In-depth articles on the water supply that serves Mount Cottrell
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 Mount Cottrell, VIC [Data set]. Compiled from Greater Western Water data (2023-24 annual report). https://waterscore.com.au/water-quality/mount-cottrell-vic/
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Related
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Related pages for Mount Cottrell, VIC
Is tap water safe?
Safety assessment
Water hardness
15 mg/L
Best water filter
Filter recommendations
Victoria water quality
State coverage
Greater Western Water
Water utility
Compare with Tarneit
Mount Cottrell vs Tarneit
Compare with Fieldstone
Mount Cottrell vs Fieldstone
Compare with Strathtulloh
Mount Cottrell vs Strathtulloh
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 Greater Western Water (2023-24 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.