Tap Water Quality in St Lucia, QLD
Postcode 4067 · Supplied by Seqwater via Brisbane
Quality Score
About St Lucia
St Lucia is a suburb of 12,220 residents in Queensland (postcode 4067). The median age is 25. It falls within the Seqwater area. Neighbouring suburbs include Ironside, St Lucia South, Mater Hill, Mater Hospital.
Most residents rent (53%), while 27% own outright, while 18% own their home with a mortgage. The median household income is $91,572 per year. The top countries of birth for residents are China (18%), United Kingdom (9%), and India (7%).
Tap water in St Lucia is supplied by Seqwater. The suburb receives water via the Brisbane supply zone.
Water quality summary
Based on recent water quality reports, St Lucia achieves a WaterScore of 8.2 out of 10, rated excellent overall. Water hardness measures 114.8 mg/L, classified as moderately hard. This may cause light mineral deposits on fixtures over time. The pH level is 34.5, which is outside the ADWG guideline range of 6.5–8.5. The water is fluoridated at 0.85 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 1.1 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 0.3 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: Ironside , St Lucia South , Mater Hill
Census Data
Suburb snapshot
Population
Median Age
Median Income
Owner-occupied
Recommended filters for St Lucia
Products matched to your water profile
BRITA
Marella 2.4L Fridge Water Filter Jug (Maxtra+)
4.7 · 16,095 ratings on Amazon
Ideal for St Lucia — removes chlorine taste and odour.
ZeroWater
2.8L 5-Stage Jug (PFAS + Fluoride + Lead, IAPMO Certified)
4.2 · 5,315 ratings on Amazon
A reliable 2.8l 5-stage jug (pfas + fluoride + lead, iapmo certified) suitable for St Lucia's water profile.
Purewell
8.5L Stainless Steel Gravity System
4.4 · 1,137 ratings on Amazon
Ideal for St Lucia — removes chlorine taste and odour.
Comparison
How St Lucia compares
Compared to Queensland and national averages
| Metric | St Lucia | QLD Avg | National Avg |
|---|---|---|---|
| Hardness | 114.8 mg/L | 74.8 mg/L | 85.1 mg/L |
| pH | 34.5 | 23.6 | 8.4 |
| Fluoride | 0.85 mg/L | 0.8 mg/L | 0.7 mg/L |
| Chlorine | 1.1 mg/L | — | — |
| Turbidity | 0.3 NTU | 0.3 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 | 0.85 | mg/L | < 1.5 | Good |
| Free Chlorine | 1.1 | mg/L | < 5 | Good |
| Monochloramine | 3 | mg/L | < 3 | Near limit |
| Total Chlorine | 3 | mg/L | < 5 | Good |
| Chlorate | 0.032 | mg/L | No limit | Measured |
| Arsenic | 0.0005 | mg/L | No limit | Measured |
| Cadmium | 0.0001 | mg/L | No limit | Measured |
| Chromium | 0.001 | mg/L | No limit | Measured |
| Copper | 0.001 | mg/L | < 2 | Good |
| Lead | 0.001 | mg/L | < 0.01 | Good |
| Manganese | 0.003 | mg/L | < 0.1 | Good |
| Nickel | 0.001 | mg/L | No limit | Measured |
| E. coli | 0 | CFU/100mL | < 0 | Compliant |
| Nitrate | 0.027 | mg/L | < 50 | Good |
| Nitrite | 0.002 | mg/L | No limit | Measured |
| Trihalomethanes | 112.5 | µg/L | < 0.25 | Exceeds |
| Chloride | 83.5 | mg/L | < 250 | Good |
| Hardness | 114.8 | mg/L | < 200 | Good |
| Sodium | 43.5 | mg/L | < 180 | Good |
| pH | 34.5 | mg/L | 6.5 – 8.5 | Outside range |
| Aluminium | 0.053 | mg/L | < 0.2 | Good |
| Iron | 0.01 | mg/L | < 0.3 | Good |
| Zinc | 0.005 | mg/L | No limit | Measured |
| Colour | 1.6 | HU | < 15 | Good |
| Turbidity | 0.3 | NTU | < 5 | Good |
| Calcium | 23.8 | mg/L | No limit | Measured |
| Magnesium | 12.93 | mg/L | No limit | Measured |
| Alkalinity | 92 | mg/L | No limit | Measured |
| Conductivity | 497.2 | µS/cm | No limit | Measured |
| Temperature | 29.3 | °C | No limit | Measured |
| Ndma | 0.003 | µg/L | No limit | Measured |
Safety
Safety assessment
Of 31 parameters tested, most fall within Australian Drinking Water Guidelines with 2 exceptions: Trihalomethanes at 112.5 µg/L and pH at 34.5 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
Moderately hard (114.8 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.
Outside Range
pH Level
pH of 34.5 is outside 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 0.85 mg/L. Within the recommended 0.6–1.1 mg/L range for dental health.
Chlorine
Disinfection
Chlorine measured at 1.1 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
St Lucia's chlorine level is 1.1 mg/L. An activated carbon jug filter or benchtop unit can noticeably reduce chlorine taste and odour from tap water.
Soft Water Advantage
St Lucia's water is moderately hard at 114.8 mg/L. You can use less soap and detergent, as it lathers easily with softer water.
Fluoride in Your Water
Fluoride measures 0.85 mg/L in St Lucia. Australian guidelines allow up to 1.5 mg/L. This is added by utilities to support dental health in the community.
Alkaline Water
pH measures 34.5 in St Lucia, which is above the ADWG guideline range. This may cause a slightly bitter taste but is generally not a practical concern.
Get water quality alerts
We'll email you when St Lucia's water data is updated.
FAQ
Frequently asked questions
Is tap water safe to drink in St Lucia?
How hard is the water in St Lucia?
What water utility supplies St Lucia?
Does St Lucia water have fluoride?
What is the water quality score for St Lucia?
What is the population of St Lucia?
Supplier
Water utility
- Utility
- Seqwater
- Supply Zone
- Brisbane
- Data Source
- Seqwater — Brisbane
Nearby
Nearby suburbs
Same water utility, similar water quality
Similar Quality
Suburbs with similar water quality
Suburbs scoring between 7.2 and 9.2
Utility reports average the grid — not your home
St Lucia'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 Brisbane and South East Queensland
In-depth articles on the water supply that serves St Lucia
Related
Explore more
Related pages for St Lucia, QLD
Is tap water safe?
Safety assessment
Water hardness
114.8 mg/L
Best water filter
Filter recommendations
Queensland water quality
State coverage
Seqwater
Water utility
Compare with Ironside
St Lucia vs Ironside
Compare with St Lucia South
St Lucia vs St Lucia South
Compare with Mater Hill
St Lucia vs Mater Hill
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 Seqwater (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.