Tap Water Quality in Carnamah, WA
Postcode 6517 · Supplied by Water Corporation via Mid West
Quality Score
About Carnamah
Carnamah is a suburb of 407 residents in Western Australia (postcode 6517). The median age is 43. It falls within the Water Corporation area. Neighbouring suburbs include Winchester, Coorow, Eganu, Marchagee.
Most residents own outright (45%), while 29% rent, while 14% own their home with a mortgage. The median household income is $70,200 per year. The top countries of birth for residents are United Kingdom (46%), Germany (10%), and New Zealand (10%).
Tap water in Carnamah is supplied by Water Corporation. The suburb receives water via the Mid West supply zone.
Water quality summary
Based on recent water quality reports, Carnamah achieves a WaterScore of 8.5 out of 10, rated excellent overall. Water hardness measures 120 mg/L, classified as moderately hard. This may cause light mineral deposits on fixtures over time. The pH level is 7.76, 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. Total dissolved solids (TDS) measure 858 mg/L, considered elevated 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: Winchester , Coorow , Eganu
Census Data
Suburb snapshot
Population
Median Age
Median Income
Owner-occupied
Recommended filters for Carnamah
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 Carnamah's water profile.
Waterdrop
TSA Under-Sink Filter (Fluoride + PFAS)
4.4 · 2,237 ratings on Amazon
A reliable tsa under-sink filter (fluoride + pfas) suitable for Carnamah'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 Carnamah's water profile.
Comparison
How Carnamah compares
Compared to Western Australia and national averages
| Metric | Carnamah | WA Avg | National Avg |
|---|---|---|---|
| Hardness | 120 mg/L | 122.1 mg/L | 85.1 mg/L |
| pH | 7.76 | 8 | 8.4 |
| Fluoride | 0.78 mg/L | 0.8 mg/L | 0.7 mg/L |
| Turbidity | 0.1 NTU | 0.2 NTU | 0.4 NTU |
| TDS | 858 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 | 63.3 | mg/L CaCO3 | No limit | Measured |
| Aluminium | 0.013 | mg/L | < 0.2 | Good |
| Chloride | 400 | mg/L | < 250 | Exceeds |
| Hardness | 120 | mg/L CaCO3 | < 200 | Good |
| Iron | 0.107 | mg/L | < 0.3 | Good |
| Manganese | 0.005 | mg/L | < 0.1 | Good |
| pH | 7.76 | pH units | 6.5 – 8.5 | Normal |
| Sodium | 253 | mg/L | < 180 | Exceeds |
| Sulfate | 57 | mg/L | < 500 | Good |
| Total Dissolved Solids | 858 | mg/L | < 600 | Exceeds |
| Colour | 1 | HU | < 15 | Good |
| Turbidity | 0.1 | NTU | < 5 | Good |
| Fluoride | 0.78 | mg/L | < 1.5 | Good |
| Nitrate | 2.6 | mg/L | < 50 | Good |
| Trihalomethanes | 0.038 | mg/L | < 0.25 | Good |
Safety
Safety assessment
Of 15 parameters tested, several exceed Australian Drinking Water Guidelines: Chloride (400 mg/L), Sodium (253 mg/L), Total Dissolved Solids (858 mg/L).
Based on comparison with Australian Drinking Water Guidelines (ADWG)
Explained
What these numbers mean
Hard (120 mg/L)
Water Hardness
Your water is moderately hard. You may notice light limescale deposits on kettle elements and taps over time. Soap lathers reasonably well, though slightly more product may be needed. Skin and hair are generally unaffected, and appliance lifespan should not be significantly reduced at this level.
Normal Range
pH Level
pH of 7.76 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.
Data unavailable
Disinfection
Chlorine data is not currently available for Carnamah.
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
Carnamah's water is moderately hard at 120 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 Carnamah. Australian guidelines allow up to 1.5 mg/L. This is added by utilities to support dental health in the community.
Consider a Filter for TDS
Total dissolved solids measure 858 mg/L. A reverse osmosis filter can reduce dissolved minerals if you prefer a cleaner taste in drinking water.
Get water quality alerts
We'll email you when Carnamah's water data is updated.
FAQ
Frequently asked questions
Is tap water safe to drink in Carnamah?
How hard is the water in Carnamah?
What water utility supplies Carnamah?
Does Carnamah water have fluoride?
What is the water quality score for Carnamah?
What is the population of Carnamah?
Supplier
Water utility
- Utility
- Water Corporation
- Supply Zone
- Mid West
- Data Source
- Water Corporation — WC Mid West Aesthetic Tables, WC Mid West Health Tables
Nearby
Nearby suburbs
Same water utility, similar water quality
Similar Quality
Suburbs with similar water quality
Suburbs scoring between 7.5 and 9.5
Utility reports average the grid — not your home
Carnamah'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 Carnamah
Related
Explore more
Related pages for Carnamah, WA
Is tap water safe?
Safety assessment
Water hardness
120 mg/L
Best water filter
Filter recommendations
Western Australia water quality
State coverage
Water Corporation
Water utility
Compare with Winchester
Carnamah vs Winchester
Compare with Coorow
Carnamah vs Coorow
Compare with Eganu
Carnamah vs Eganu
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.
