Tap Water Quality in Tumbi Umbi, NSW
Postcode 2261 · Supplied by Central Coast Council via Central Coast System
Quality Score
About Tumbi Umbi
Tumbi Umbi is a suburb of 5,369 residents in New South Wales (postcode 2261). The median age is 45. It falls within the Central Coast Council area. Neighbouring suburbs include Killarney Vale, Berkeley Vale, Bay Village, Chittaway Bay.
Most residents own their home with a mortgage (39%), while 35% own outright, while 15% rent. The median household income is $86,164 per year. The top countries of birth for residents are United Kingdom (43%), New Zealand (10%), and South Africa (5%).
Tap water in Tumbi Umbi is supplied by Central Coast Council. The suburb receives water via the Central Coast System supply zone.
Water quality summary
Based on 2025 water quality reports, Tumbi Umbi achieves a WaterScore of 9.1 out of 10, rated excellent overall. Water hardness measures 49 mg/L, classified as soft. This is gentle on appliances and skin, with minimal limescale buildup expected. The pH level is 7.6, which is within the ADWG guideline range of 6.5–8.5. The water is fluoridated at 0.79 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 1.19 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 46 mg/L, considered low against the ADWG guideline of 600 mg/L. Turbidity is 0.56 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: Killarney Vale , Berkeley Vale , Bay Village
Census Data
Suburb snapshot
Population
Median Age
Median Income
Owner-occupied
Recommended filters for Tumbi Umbi
Products matched to your water profile
BRITA
Marella 2.4L Fridge Water Filter Jug (Maxtra+)
4.7 · 16,095 ratings on Amazon
Ideal for Tumbi Umbi — removes chlorine taste and odour.
Waterdrop
TSA Under-Sink Filter (Fluoride + PFAS)
4.4 · 2,237 ratings on Amazon
A reliable tsa under-sink filter (fluoride + pfas) suitable for Tumbi Umbi's water profile.
Purewell
8.5L Stainless Steel Gravity System
4.4 · 1,137 ratings on Amazon
Ideal for Tumbi Umbi — removes chlorine taste and odour.
Comparison
How Tumbi Umbi compares
Compared to New South Wales and national averages
| Metric | Tumbi Umbi | NSW Avg | National Avg |
|---|---|---|---|
| Hardness | 49 mg/L | 45.9 mg/L | 85.1 mg/L |
| pH | 7.6 | 7.7 | 8.4 |
| Fluoride | 0.79 mg/L | 1 mg/L | 0.7 mg/L |
| Chlorine | 1.19 mg/L | — | — |
| Turbidity | 0.56 NTU | 0.2 NTU | 0.4 NTU |
| TDS | 46 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 |
|---|---|---|---|---|
| E. coli | 0 | MPN/100mL | < 0 | Compliant |
| Free Chlorine | 1.19 | mg/L | < 5 | Good |
| Total Chlorine | 1.4 | mg/L | < 5 | Good |
| Copper | 0.018 | mg/L | < 2 | Good |
| Lead | 0.0004 | mg/L | < 0.01 | Good |
| Manganese | 0.006 | mg/L | < 0.1 | Good |
| Fluoride | 0.79 | mg/L | < 1.5 | Good |
| Trihalomethanes | 115 | mg/L | < 0.25 | Exceeds |
| pH | 7.6 | pH units | 6.5 – 8.5 | Normal |
| Turbidity | 0.56 | NTU | < 5 | Good |
| Colour | 1 | HU | < 15 | Good |
| Hardness | 49 | mg/L CaCO3 | < 200 | Good |
| Total Dissolved Solids | 46 | mg/L | < 600 | Good |
| Aluminium | 0.04 | mg/L | < 0.2 | Good |
| Zinc | 0.01 | mg/L | No limit | Measured |
| PFOS | 0.001 | µg/L | < 0.07 | Good |
| Pfhxs | 0.001 | µg/L | No limit | Measured |
| PFOA | 0.001 | µg/L | < 0.56 | Good |
| Pfbs | 0.001 | µg/L | No limit | Measured |
| Iron | 0.02 | mg/L | < 0.3 | Good |
| Pfos Pfhxs | 0.002 | µg/L | No limit | Measured |
Safety
Safety assessment
Of 21 parameters tested, most fall within Australian Drinking Water Guidelines with 1 exception: Trihalomethanes at 115 mg/L. 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 (49 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 7.6 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 0.79 mg/L. Within the recommended 0.6–1.1 mg/L range for dental health.
Chlorine
Disinfection
Chlorine measured at 1.19 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
Tumbi Umbi's chlorine level is 1.19 mg/L. An activated carbon jug filter or benchtop unit can noticeably reduce chlorine taste and odour from tap water.
Soft Water Advantage
Tumbi Umbi's water is soft at 49 mg/L. You can use less soap and detergent, as it lathers easily with softer water.
Fluoride in Your Water
Fluoride measures 0.79 mg/L in Tumbi Umbi. Australian guidelines allow up to 1.5 mg/L. This is added by utilities to support dental health in the community.
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FAQ
Frequently asked questions
Is tap water safe to drink in Tumbi Umbi?
How hard is the water in Tumbi Umbi?
What water utility supplies Tumbi Umbi?
Does Tumbi Umbi water have fluoride?
What is the water quality score for Tumbi Umbi?
What is the population of Tumbi Umbi?
Supplier
Water utility
- Utility
- Central Coast Council
- Supply Zone
- Central Coast System
- Data Source
- Central Coast Council — quarterly summary of drinking water quality october december 2024, Quarterly 20summary 20of 20drinking 20water 20quality 20Jul 20 20Sept 202025, annual drinking water quality report 2024 2025
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
Tumbi Umbi'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.
Related
Explore more
Related pages for Tumbi Umbi, NSW
Is tap water safe?
Safety assessment
Water hardness
49 mg/L
Best water filter
Filter recommendations
New South Wales water quality
State coverage
Central Coast Council
Water utility
Compare with Killarney Vale
Tumbi Umbi vs Killarney Vale
Compare with Berkeley Vale
Tumbi Umbi vs Berkeley Vale
Compare with Bay Village
Tumbi Umbi vs Bay Village
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 Central Coast Council (2025 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.