Tap Water Quality in Grasstree Hill, TAS
Postcode 7017 · Supplied by TasWater via Clarence Greater Hobart
Quality Score
About Grasstree Hill
Grasstree Hill is a suburb of 108 residents in Tasmania (postcode 7017). The median age is 45. It falls within the TasWater area. Neighbouring suburbs include Honeywood, Old Beach, Otago, Risdon.
Most residents own outright (64%), while 18% own their home with a mortgage, while 7% rent. The median household income is $58,500 per year. The top countries of birth for residents are Germany (56%), New Zealand (56%), and United Kingdom (33%).
Tap water in Grasstree Hill is supplied by TasWater. The suburb receives water via the Clarence Greater Hobart supply zone.
Water quality summary
Based on recent water quality reports, Grasstree Hill achieves a WaterScore of 9.8 out of 10, rated excellent overall. Water hardness measures 46.285714 mg/L, classified as soft. This is gentle on appliances and skin, with minimal limescale buildup expected. The pH level is 7.414137, which is within the ADWG guideline range of 6.5–8.5. Chlorine, used for disinfection, measures 0.829548 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 75.285714 mg/L, considered low against the ADWG guideline of 600 mg/L. Turbidity is 0.310575 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 Grasstree Hill
Products matched to your water profile
BRITA
Marella 2.4L Fridge Water Filter Jug (Maxtra+)
4.7 · 16,095 ratings on Amazon
Ideal for Grasstree Hill — 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 Grasstree Hill's water profile.
Purewell
8.5L Stainless Steel Gravity System
4.4 · 1,137 ratings on Amazon
Ideal for Grasstree Hill — removes chlorine taste and odour.
Comparison
How Grasstree Hill compares
Compared to Tasmania and national averages
| Metric | Grasstree Hill | TAS Avg | National Avg |
|---|---|---|---|
| Hardness | 46.285714 mg/L | 34.8 mg/L | 85.1 mg/L |
| pH | 7.414137 | 7.4 | 8.4 |
| Fluoride | — | 0.9 mg/L | 0.7 mg/L |
| Chlorine | 0.829548 mg/L | — | — |
| Turbidity | 0.310575 NTU | 0.3 NTU | 0.4 NTU |
| TDS | 75.285714 mg/L | 93.3 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 |
|---|---|---|---|---|
| Alkalinity | 19.727273 | mg/L | No limit | Measured |
| Aluminium | 0.033333 | mg/L | < 0.2 | Good |
| Ammonia | 0.002182 | mg/L | No limit | Measured |
| Antimony | 0.001 | mg/L | No limit | Measured |
| Arsenic | 0.001 | mg/L | No limit | Measured |
| Cadmium | 0.0002 | mg/L | No limit | Measured |
| Calcium | 16.666667 | mg/L | No limit | Measured |
| Chloride | 10.111111 | mg/L | < 250 | Good |
| Free Chlorine | 0.829548 | mg/L | < 5 | Good |
| Total Chlorine | 0.966842 | mg/L | < 5 | Good |
| Chromium | 0.001 | mg/L | No limit | Measured |
| Colour | 2.238095 | Pt-Co | < 15 | Good |
| Conductivity | 121.363636 | uS/cm | No limit | Measured |
| Copper | 0.007944 | mg/L | < 2 | Good |
| Cyanide | 0.005 | mg/L | No limit | Measured |
| E. coli | 0 | MPN/100ml | < 0 | Compliant |
| Hardness | 46.285714 | mg/L | < 200 | Good |
| Iron | 0.012222 | mg/L | < 0.3 | Good |
| Lead | 0.001 | mg/L | < 0.01 | Good |
| Magnesium | 2.511111 | mg/L | No limit | Measured |
| Manganese | 0.001111 | mg/L | < 0.1 | Good |
| Mercury | 0.0001 | mg/L | No limit | Measured |
| Nickel | 0.001 | mg/L | No limit | Measured |
| Nitrate | 0.040409 | mg/L | < 50 | Good |
| Nitrite | 0.002 | mg/L | No limit | Measured |
| pH | 7.414137 | pH units | 6.5 – 8.5 | Normal |
| Sodium | 4.333333 | mg/L | < 180 | Good |
| Sulfate | 20 | mg/L | < 500 | Good |
| Temperature | 13.944521 | degrees C | No limit | Measured |
| Total Coliforms | 0 | MPN/100ml | < 0 | Compliant |
| Total Dissolved Solids | 75.285714 | mg/L | < 600 | Good |
| Trihalomethanes | 0.027556 | mg/L | < 0.25 | Good |
| Turbidity | 0.310575 | NTU | < 5 | Good |
| Zinc | 0.004056 | mg/L | No limit | Measured |
Safety
Safety assessment
Based on 34 parameters tested, all results fall within Australian Drinking Water Guidelines. 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 (46.285714 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 7.414137 is within the ideal range of 6.5–8.5. The ADWG recommends pH between 6.5 and 8.5 for drinking water.
Data unavailable
Fluoride
Fluoride data is not currently available for Grasstree Hill.
Chlorine
Disinfection
Chlorine measured at 0.829548 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 Grasstree Hill measures 0.829548 mg/L, which is low. Filling a jug and letting it stand for 30 minutes will reduce any residual taste.
Soft Water Advantage
Grasstree Hill's water is soft at 46.285714 mg/L. You can use less soap and detergent, as it lathers easily with softer water.
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.
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FAQ
Frequently asked questions
Is tap water safe to drink in Grasstree Hill?
How hard is the water in Grasstree Hill?
What water utility supplies Grasstree Hill?
Does Grasstree Hill water have fluoride?
What is the water quality score for Grasstree Hill?
What is the population of Grasstree Hill?
Supplier
Water utility
- Utility
- TasWater
- Supply Zone
- Clarence Greater Hobart
- Data Source
- TasWater — Clarence Greater Hobart
Nearby
Nearby suburbs
Same water utility, similar water quality
Similar Quality
Suburbs with similar water quality
Suburbs scoring between 8.8 and 10.0
Utility reports average the grid — not your home
Grasstree Hill'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 Hobart and Tasmania
In-depth articles on the water supply that serves Grasstree Hill
Related
Explore more
Related pages for Grasstree Hill, TAS
Is tap water safe?
Safety assessment
Water hardness
46.285714 mg/L
Best water filter
Filter recommendations
Tasmania water quality
State coverage
TasWater
Water utility
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Grasstree Hill vs Honeywood
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Compare with Otago
Grasstree Hill vs Otago
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 TasWater (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.