Tap Water Quality in Hollow Tree, TAS
Postcode 7140 · Supplied by TasWater via Bothwell
Quality Score
About Hollow Tree
Hollow Tree is a suburb of 33 residents in Tasmania (postcode 7140). The median age is 36. It falls within the TasWater area. Neighbouring suburbs include Black Hills, Boyer, Bradys Lake, Butlers Gorge.
Most residents own outright (56%), while 56% rent, while 0% own their home with a mortgage. The median household income is $75,816 per year.
Tap water in Hollow Tree is supplied by TasWater. The suburb receives water via the Bothwell supply zone.
Water quality summary
Based on recent water quality reports, Hollow Tree achieves a WaterScore of 9.6 out of 10, rated excellent overall. Water hardness measures 80.285714 mg/L, classified as moderately hard. This may cause light mineral deposits on fixtures over time. The pH level is 7.385625, which is within the ADWG guideline range of 6.5–8.5. Chlorine, used for disinfection, measures 1.087187 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 185.714286 mg/L, considered low against the ADWG guideline of 600 mg/L. Turbidity is 0.285938 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: Black Hills , Boyer , Bradys Lake
Census Data
Suburb snapshot
Population
Median Age
Median Income
Owner-occupied
Recommended filters for Hollow Tree
Products matched to your water profile
BRITA
Marella 2.4L Fridge Water Filter Jug (Maxtra+)
4.7 · 16,095 ratings on Amazon
Ideal for Hollow Tree — 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 Hollow Tree's water profile.
Purewell
8.5L Stainless Steel Gravity System
4.4 · 1,137 ratings on Amazon
Ideal for Hollow Tree — removes chlorine taste and odour.
Comparison
How Hollow Tree compares
Compared to Tasmania and national averages
| Metric | Hollow Tree | TAS Avg | National Avg |
|---|---|---|---|
| Hardness | 80.285714 mg/L | 34.8 mg/L | 85.1 mg/L |
| pH | 7.385625 | 7.4 | 8.4 |
| Fluoride | — | 0.9 mg/L | 0.7 mg/L |
| Chlorine | 1.087187 mg/L | — | — |
| Turbidity | 0.285938 NTU | 0.3 NTU | 0.4 NTU |
| TDS | 185.714286 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 | 46.857143 | mg/L | No limit | Measured |
| Aluminium | 0.011667 | mg/L | < 0.2 | Good |
| Ammonia | 0.002 | 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 | 17.666667 | mg/L | No limit | Measured |
| Chloride | 78.666667 | mg/L | < 250 | Good |
| Free Chlorine | 1.087187 | mg/L | < 5 | Good |
| Total Chlorine | 1.356667 | mg/L | < 5 | Good |
| Chromium | 0.001 | mg/L | No limit | Measured |
| Colour | 2.428571 | Pt-Co | < 15 | Good |
| Conductivity | 318.571429 | uS/cm | No limit | Measured |
| Copper | 0.003667 | mg/L | < 2 | Good |
| Cyanide | 0.005 | mg/L | No limit | Measured |
| E. coli | 0 | MPN/100ml | < 0 | Compliant |
| Hardness | 80.285714 | mg/L | < 200 | Good |
| Iron | 0.01 | mg/L | < 0.3 | Good |
| Lead | 0.001 | mg/L | < 0.01 | Good |
| Magnesium | 11.3 | mg/L | No limit | Measured |
| Manganese | 0.0015 | mg/L | < 0.1 | Good |
| Mercury | 0.0001 | mg/L | No limit | Measured |
| Nickel | 0.001 | mg/L | No limit | Measured |
| Nitrate | 0.105571 | mg/L | < 50 | Good |
| Nitrite | 0.002 | mg/L | No limit | Measured |
| pH | 7.385625 | pH units | 6.5 – 8.5 | Normal |
| Sodium | 23.0005 | mg/L | < 180 | Good |
| Sulfate | 10.571429 | mg/L | < 500 | Good |
| Temperature | 12.5375 | degrees C | No limit | Measured |
| Total Coliforms | 0 | MPN/100ml | < 0 | Compliant |
| Total Dissolved Solids | 185.714286 | mg/L | < 600 | Good |
| Trihalomethanes | 0.047667 | mg/L | < 0.25 | Good |
| Turbidity | 0.285938 | NTU | < 5 | Good |
| Zinc | 0.001667 | 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
Moderately hard (80.285714 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 7.385625 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 Hollow Tree.
Chlorine
Disinfection
Chlorine measured at 1.087187 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
Hollow Tree's chlorine level is 1.087187 mg/L. An activated carbon jug filter or benchtop unit can noticeably reduce chlorine taste and odour from tap water.
Soft Water Advantage
Hollow Tree's water is moderately hard at 80.285714 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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We'll email you when Hollow Tree's water data is updated.
FAQ
Frequently asked questions
Is tap water safe to drink in Hollow Tree?
How hard is the water in Hollow Tree?
What water utility supplies Hollow Tree?
Does Hollow Tree water have fluoride?
What is the water quality score for Hollow Tree?
What is the population of Hollow Tree?
Supplier
Water utility
- Utility
- TasWater
- Supply Zone
- Bothwell
- Data Source
- TasWater — Bothwell
Nearby
Nearby suburbs
Same water utility, similar water quality
Similar Quality
Suburbs with similar water quality
Suburbs scoring between 8.6 and 10.0
Utility reports average the grid — not your home
Hollow Tree'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 Hollow Tree
Related
Explore more
Related pages for Hollow Tree, TAS
Is tap water safe?
Safety assessment
Water hardness
80.285714 mg/L
Best water filter
Filter recommendations
Tasmania water quality
State coverage
TasWater
Water utility
Compare with Black Hills
Hollow Tree vs Black Hills
Compare with Boyer
Hollow Tree vs Boyer
Compare with Bradys Lake
Hollow Tree vs Bradys Lake
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.