Tap Water Quality in Yannathan, VIC
Postcode 3981 · Supplied by South East Water via Koo Wee Rup
Quality Score
About Yannathan
Yannathan is a suburb of 272 residents in Victoria (postcode 3981). The median age is 41. It falls within the Melbourne South-East area. Neighbouring suburbs include Lang Lang East, Heath Hill, Lang Lang, Bayles.
Most residents own their home with a mortgage (37%), while 36% own outright, while 21% rent. The median household income is $89,336 per year. The top countries of birth for residents are Philippines (35%), Ireland (22%), and South Africa (22%).
Tap water in Yannathan is supplied by South East Water. South East Water serves Melbourne South-East. The suburb receives water via the Koo Wee Rup supply zone.
Water quality summary
Based on 2023-24 water quality reports, Yannathan achieves a WaterScore of 9.1 out of 10, rated excellent overall. The water is fluoridated at 0.82 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 0.52 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.
Compare with nearby suburbs: Lang Lang East , Heath Hill , Lang Lang
Census Data
Suburb snapshot
Population
Median Age
Median Income
Owner-occupied
Recommended filters for Yannathan
Products matched to your water profile
BRITA
Marella 2.4L Fridge Water Filter Jug (Maxtra+)
4.7 · 16,095 ratings on Amazon
Ideal for Yannathan — 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 Yannathan's water profile.
Purewell
8.5L Stainless Steel Gravity System
4.4 · 1,137 ratings on Amazon
Ideal for Yannathan — removes chlorine taste and odour.
Comparison
How Yannathan compares
Compared to Victoria and national averages
| Metric | Yannathan | VIC Avg | National Avg |
|---|---|---|---|
| Hardness | — | 28 mg/L | 85.1 mg/L |
| pH | — | 7.4 | 8.4 |
| Fluoride | 0.82 mg/L | 0.7 mg/L | 0.7 mg/L |
| Chlorine | 0.52 mg/L | — | — |
| Turbidity | — | 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 |
|---|---|---|---|---|
| Fluoride | 0.82 | mg/L | < 1.5 | Good |
| Free Chlorine | 0.52 | mg/L | < 5 | Good |
| Colour | 7.5 | HU | < 15 | Good |
| Iron | 0.01 | mg/L | < 0.3 | Good |
Safety
Safety assessment
Based on 4 parameters tested, all results fall within Australian Drinking Water Guidelines.
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 Yannathan.
Fluoridated
Fluoride
Fluoride at 0.82 mg/L. Within the recommended 0.6–1.1 mg/L range for dental health.
Chlorine
Disinfection
Chlorine measured at 0.52 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 Yannathan measures 0.52 mg/L, which is low. Filling a jug and letting it stand for 30 minutes will reduce any residual taste.
Fluoride in Your Water
Fluoride measures 0.82 mg/L in Yannathan. 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 Yannathan's water data is updated.
FAQ
Frequently asked questions
Is tap water safe to drink in Yannathan?
How hard is the water in Yannathan?
What water utility supplies Yannathan?
Does Yannathan water have fluoride?
What is the water quality score for Yannathan?
What is the population of Yannathan?
Supplier
Water utility
- Utility
- South East Water
- Service Area
- Melbourne South-East
- Supply Zone
- Koo Wee Rup
- Website
- www.southeastwater.com.au
- Data Source
- South East Water — SEW 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 8.1 and 10.0
Utility reports average the grid — not your home
Yannathan'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 Yannathan
Related
Explore more
Related pages for Yannathan, VIC
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 South East 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.