Tap Water Quality in Highland Park, QLD
Postcode 4211 · Supplied by Seqwater via Gold Coast
Quality Score
About Highland Park
Highland Park is a suburb of 6,576 residents in Queensland (postcode 4211). The median age is 42. It falls within the Seqwater area. Neighbouring suburbs include Nerang, Carrara, Worongary, Molendinar.
Most residents own their home with a mortgage (46%), while 34% own outright, while 17% rent. The median household income is $83,668 per year. The top countries of birth for residents are New Zealand (31%), United Kingdom (23%), and South Africa (4%).
Tap water in Highland Park is supplied by Seqwater. The suburb receives water via the Gold Coast supply zone.
Water quality summary
Based on recent water quality reports, Highland Park achieves a WaterScore of 8.4 out of 10, rated excellent overall. Water hardness measures 33.9 mg/L, classified as soft. This is gentle on appliances and skin, with minimal limescale buildup expected. The pH level is 6.2, which is outside the ADWG guideline range of 6.5–8.5. The water is fluoridated at 0.81 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 1.7 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.
Census Data
Suburb snapshot
Population
Median Age
Median Income
Owner-occupied
Recommended filters for Highland Park
Products matched to your water profile
BRITA
Marella 2.4L Fridge Water Filter Jug (Maxtra+)
4.7 · 16,095 ratings on Amazon
Ideal for Highland Park — 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 Highland Park's water profile.
Purewell
8.5L Stainless Steel Gravity System
4.4 · 1,137 ratings on Amazon
Ideal for Highland Park — removes chlorine taste and odour.
Comparison
How Highland Park compares
Compared to Queensland and national averages
| Metric | Highland Park | QLD Avg | National Avg |
|---|---|---|---|
| Hardness | 33.9 mg/L | 74.8 mg/L | 85.1 mg/L |
| pH | 6.2 | 23.6 | 8.4 |
| Fluoride | 0.81 mg/L | 0.8 mg/L | 0.7 mg/L |
| Chlorine | 1.7 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 | 0.81 | mg/L | < 1.5 | Good |
| Free Chlorine | 1.7 | mg/L | < 5 | Good |
| Total Chlorine | 1.6 | mg/L | < 5 | Good |
| Bromate | 0.005 | mg/L | No limit | Measured |
| Chlorate | 0.066 | 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 | 0.001 | mg/L | < 0.1 | Good |
| Mercury | 0.0001 | mg/L | No limit | Measured |
| Nickel | 0.001 | mg/L | No limit | Measured |
| E. coli | 0 | CFU/100mL | < 0 | Compliant |
| Trihalomethanes | 39.6 | µg/L | < 0.25 | Exceeds |
| Chloride | 25.7 | mg/L | < 250 | Good |
| Hardness | 33.9 | mg/L | < 200 | Good |
| Sodium | 18.3 | mg/L | < 180 | Good |
| pH | 6.2 | mg/L | 6.5 – 8.5 | Outside range |
| Aluminium | 0.013 | mg/L | < 0.2 | Good |
| Iron | 0.01 | mg/L | < 0.3 | Good |
| Zinc | 0.005 | mg/L | No limit | Measured |
| Colour | 1.3 | HU | < 15 | Good |
| Turbidity | 0.3 | NTU | < 5 | Good |
| Calcium | 12.5 | mg/L | No limit | Measured |
| Magnesium | 0.7 | mg/L | No limit | Measured |
| Alkalinity | 29.5 | mg/L | No limit | Measured |
| Conductivity | 197.5 | µS/cm | No limit | Measured |
| Temperature | 25 | °C | No limit | Measured |
| Ndma | 0.003 | µg/L | No limit | Measured |
Safety
Safety assessment
Of 30 parameters tested, most fall within Australian Drinking Water Guidelines with 2 exceptions: Trihalomethanes at 39.6 µg/L and pH at 6.2 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 (33.9 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.
Outside Range
pH Level
pH of 6.2 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 0.81 mg/L. Within the recommended 0.6–1.1 mg/L range for dental health.
Chlorine
Disinfection
Chlorine measured at 1.7 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
Highland Park's chlorine level is 1.7 mg/L. An activated carbon jug filter or benchtop unit can noticeably reduce chlorine taste and odour from tap water.
Soft Water Advantage
Highland Park's water is soft at 33.9 mg/L. You can use less soap and detergent, as it lathers easily with softer water.
Fluoride in Your Water
Fluoride measures 0.81 mg/L in Highland Park. Australian guidelines allow up to 1.5 mg/L. This is added by utilities to support dental health in the community.
Slightly Acidic Water
pH measures 6.2 in Highland Park, which is slightly acidic. Running the tap for 30 seconds before drinking can flush any metals that dissolve more readily in acidic water.
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FAQ
Frequently asked questions
Is tap water safe to drink in Highland Park?
How hard is the water in Highland Park?
What water utility supplies Highland Park?
Does Highland Park water have fluoride?
What is the water quality score for Highland Park?
What is the population of Highland Park?
Supplier
Water utility
- Utility
- Seqwater
- Supply Zone
- Gold Coast
- Data Source
- Seqwater — Gold Coast
Nearby
Nearby suburbs
Same water utility, similar water quality
Similar Quality
Suburbs with similar water quality
Suburbs scoring between 7.4 and 9.4
Utility reports average the grid — not your home
Highland Park'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 the Gold Coast
In-depth articles on the water supply that serves Highland Park
Is tap water safe to drink in the Gold Coast?
What the utility data says about the Gold Coast's supply
Water hardness in the Gold Coast
Soft at 35 to 45 mg/L, and which northern suburbs are the exception
Best water filters for Australian tap water
Ranked picks by water problem, from jugs to under-sink RO
Related
Explore more
Related pages for Highland Park, QLD
Is tap water safe?
Safety assessment
Water hardness
33.9 mg/L
Best water filter
Filter recommendations
Queensland water quality
State coverage
Seqwater
Water utility
Compare with Nerang
Highland Park vs Nerang
Compare with Carrara
Highland Park vs Carrara
Compare with Worongary
Highland Park vs Worongary
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.