Tap Water Quality in Rocky Hills, TAS
Postcode 7190 · Supplied by TasWater via Swansea
Quality Score
About Rocky Hills
Rocky Hills is a suburb of 8 residents in Tasmania (postcode 7190). The median age is 53. It falls within the TasWater area. Neighbouring suburbs include Apslawn, Buckland, Cranbrook, Dolphin Sands.
Most residents own outright (100%), while 0% own their home with a mortgage, while 0% rent. The median household income is $64,948 per year.
Tap water in Rocky Hills is supplied by TasWater. The suburb receives water via the Swansea supply zone.
Water quality summary
Based on recent water quality reports, Rocky Hills achieves a WaterScore of 9.6 out of 10, rated excellent overall. Water hardness measures 51 mg/L, classified as soft. This is gentle on appliances and skin, with minimal limescale buildup expected. The pH level is 7.220625, which is within the ADWG guideline range of 6.5–8.5. The water is fluoridated at 0.82 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 1.102396 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 147.5 mg/L, considered low against the ADWG guideline of 600 mg/L. Turbidity is 0.319271 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 Rocky Hills
Products matched to your water profile
BRITA
Marella 2.4L Fridge Water Filter Jug (Maxtra+)
4.7 · 16,095 ratings on Amazon
Ideal for Rocky Hills — removes chlorine taste and odour.
ZeroWater
23-Cup Dispenser (incl. TDS Meter)
4.3 · 27,123 ratings on Amazon
A reliable 23-cup dispenser (incl. tds meter) suitable for Rocky Hills's water profile.
Purewell
8.5L Stainless Steel Gravity System
4.4 · 1,137 ratings on Amazon
Ideal for Rocky Hills — removes chlorine taste and odour.
Comparison
How Rocky Hills compares
Compared to Tasmania and national averages
| Metric | Rocky Hills | TAS Avg | National Avg |
|---|---|---|---|
| Hardness | 51 mg/L | 34.8 mg/L | 85.1 mg/L |
| pH | 7.220625 | 7.4 | 8.4 |
| Fluoride | 0.82 mg/L | 0.9 mg/L | 0.7 mg/L |
| Chlorine | 1.102396 mg/L | — | — |
| Turbidity | 0.319271 NTU | 0.3 NTU | 0.4 NTU |
| TDS | 147.5 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 | 47.5 | mg/L | No limit | Measured |
| Aluminium | 0.02125 | mg/L | < 0.2 | Good |
| Ammonia | 0.002083 | 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 | 10.4 | mg/L | No limit | Measured |
| Chloride | 35.75 | mg/L | < 250 | Good |
| Free Chlorine | 1.102396 | mg/L | < 5 | Good |
| Total Chlorine | 1.490714 | mg/L | < 5 | Good |
| Chromium | 0.001 | mg/L | No limit | Measured |
| Colour | 2.083333 | Pt-Co | < 15 | Good |
| Conductivity | 241.666667 | uS/cm | No limit | Measured |
| Copper | 0.014125 | mg/L | < 2 | Good |
| Cyanide | 0.005 | mg/L | No limit | Measured |
| E. coli | 0 | MPN/100ml | < 0 | Compliant |
| Fluoride | 0.82 | mg/L | < 1.5 | Good |
| Hardness | 51 | mg/L | < 200 | Good |
| Iron | 0.01 | mg/L | < 0.3 | Good |
| Lead | 0.001 | mg/L | < 0.01 | Good |
| Magnesium | 6.425 | mg/L | No limit | Measured |
| Manganese | 0.001 | mg/L | < 0.1 | Good |
| Mercury | 0.0001 | mg/L | No limit | Measured |
| Nickel | 0.001 | mg/L | No limit | Measured |
| Nitrate | 0.00525 | mg/L | < 50 | Good |
| Nitrite | 0.002 | mg/L | No limit | Measured |
| pH | 7.220625 | pH units | 6.5 – 8.5 | Normal |
| Sodium | 16.167333 | mg/L | < 180 | Good |
| Sulfate | 22.916667 | mg/L | < 500 | Good |
| Temperature | 14.673958 | degrees C | No limit | Measured |
| Total Coliforms | 0 | MPN/100ml | < 0 | Compliant |
| Total Dissolved Solids | 147.5 | mg/L | < 600 | Good |
| Trihalomethanes | 0.0165 | mg/L | < 0.25 | Good |
| Turbidity | 0.319271 | NTU | < 5 | Good |
| Zinc | 0.006125 | mg/L | No limit | Measured |
Safety
Safety assessment
Based on 35 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 (51 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 7.220625 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 0.82 mg/L. Within the recommended 0.6–1.1 mg/L range for dental health.
Chlorine
Disinfection
Chlorine measured at 1.102396 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
Rocky Hills's chlorine level is 1.102396 mg/L. An activated carbon jug filter or benchtop unit can noticeably reduce chlorine taste and odour from tap water.
Soft Water Advantage
Rocky Hills's water is soft at 51 mg/L. You can use less soap and detergent, as it lathers easily with softer water.
Fluoride in Your Water
Fluoride measures 0.82 mg/L in Rocky Hills. Australian guidelines allow up to 1.5 mg/L. This is added by utilities to support dental health in the community.
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We'll email you when Rocky Hills's water data is updated.
FAQ
Frequently asked questions
Is tap water safe to drink in Rocky Hills?
How hard is the water in Rocky Hills?
What water utility supplies Rocky Hills?
Does Rocky Hills water have fluoride?
What is the water quality score for Rocky Hills?
What is the population of Rocky Hills?
Supplier
Water utility
- Utility
- TasWater
- Supply Zone
- Swansea
- Data Source
- TasWater — Swansea
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
Rocky Hills'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 Rocky Hills
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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.