Tap Water Quality in Cornwall, TAS
Postcode 7215 · Supplied by TasWater via Cornwall
Quality Score
About Cornwall
Cornwall is a suburb of 82 residents in Tasmania (postcode 7215). The median age is 50. It falls within the TasWater area. Neighbouring suburbs include St Marys, Scamander, Fingal, Douglas-Apsley.
Most residents own outright (50%), while 21% own their home with a mortgage, while 11% rent. The median household income is $32,968 per year.
Tap water in Cornwall is supplied by TasWater. The suburb receives water via the Cornwall, St Marys supply zones.
Water quality summary
Based on recent water quality reports, Cornwall achieves a WaterScore of 9.5 out of 10, rated excellent overall. Water hardness measures 142.857143 mg/L, classified as hard. Residents may notice limescale buildup on appliances and fixtures. The pH level is 7.653387, which is within the ADWG guideline range of 6.5–8.5. The water is fluoridated at 0.943333 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 0.787581 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 313.333333 mg/L, considered moderate against the ADWG guideline of 600 mg/L. Turbidity is 0.172419 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
142.857143/200 mg/L
311% above Tasmania avg
68% above national avg
Recommended filters for Cornwall
Products matched to your water profile
iSpring
RCC7AK 6-Stage Under-Sink RO (with Alkaline Re-min)
4.6 · 13,756 ratings on Amazon
Ideal for Cornwall — reduces hardness from 142.857143 mg/L, removes chlorine taste and odour.
AO Smith
Salt-Free Whole House Descaler (6yr / 600,000 Gal)
4.3 · 1,517 ratings on Amazon
Ideal for Cornwall — helps reduce limescale buildup from hard water (142.857143 mg/L) without removing hardness minerals.
iSpring
Counter-top Drinking Water Filter
4.4 · 1,108 ratings on Amazon
Ideal for Cornwall — removes chlorine taste and odour.
Comparison
How Cornwall compares
Compared to Tasmania and national averages
| Metric | Cornwall | TAS Avg | National Avg |
|---|---|---|---|
| Hardness | 142.857143 mg/L | 34.8 mg/L | 85.1 mg/L |
| pH | 7.653387 | 7.4 | 8.4 |
| Fluoride | 0.943333 mg/L | 0.9 mg/L | 0.7 mg/L |
| Chlorine | 0.787581 mg/L | — | — |
| Turbidity | 0.172419 NTU | 0.3 NTU | 0.4 NTU |
| TDS | 313.333333 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 | 245 | mg/L | No limit | Measured |
| Aluminium | 0.01 | mg/L | < 0.2 | Good |
| Ammonia | 0.002286 | 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 | 51.166667 | mg/L | No limit | Measured |
| Chloride | 20 | mg/L | < 250 | Good |
| Free Chlorine | 0.787581 | mg/L | < 5 | Good |
| Total Chlorine | 0.849286 | mg/L | < 5 | Good |
| Chromium | 0.001 | mg/L | No limit | Measured |
| Colour | 2 | Pt-Co | < 15 | Good |
| Conductivity | 525 | uS/cm | No limit | Measured |
| Copper | 0.01125 | mg/L | < 2 | Good |
| Cyanide | 0.005 | mg/L | No limit | Measured |
| E. coli | 0 | MPN/100ml | < 0 | Compliant |
| Hardness | 142.857143 | mg/L | < 200 | Good |
| Iron | 0.01 | mg/L | < 0.3 | Good |
| Lead | 0.001 | mg/L | < 0.01 | Good |
| Magnesium | 5.033333 | 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 | 0.041571 | mg/L | < 50 | Good |
| Nitrite | 0.002 | mg/L | No limit | Measured |
| pH | 7.653387 | pH units | 6.5 – 8.5 | Normal |
| Sodium | 57.833333 | mg/L | < 180 | Good |
| Sulfate | 13.5 | mg/L | < 500 | Good |
| Temperature | 13.970968 | degrees C | No limit | Measured |
| Total Coliforms | 0 | MPN/100ml | < 0 | Compliant |
| Total Dissolved Solids | 313.333333 | mg/L | < 600 | Good |
| Trihalomethanes | 0.0195 | mg/L | < 0.25 | Good |
| Turbidity | 0.172419 | NTU | < 5 | Good |
| Zinc | 0.004625 | mg/L | No limit | Measured |
| Fluoride | 0.943333 | mg/L | < 1.5 | Good |
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
Hard (142.857143 mg/L)
Water Hardness
Your water is classified as hard. Expect noticeable limescale on heating elements, showerheads, and taps. Soap and shampoo may not lather as freely, requiring more product. Some residents report drier skin or hair. Periodic descaling of kettles and hot water systems is recommended to maintain efficiency.
Normal Range
pH Level
pH of 7.653387 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 0.943333 mg/L. Within the recommended 0.6–1.1 mg/L range for dental health.
Chlorine
Disinfection
Chlorine measured at 0.787581 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 Cornwall measures 0.787581 mg/L, which is low. Filling a jug and letting it stand for 30 minutes will reduce any residual taste.
Watch for Limescale
Cornwall has hard water at 142.857143 mg/L. Wipe taps and showerheads periodically with vinegar to prevent limescale buildup on fixtures.
Fluoride in Your Water
Fluoride measures 0.943333 mg/L in Cornwall. Australian guidelines allow up to 1.5 mg/L. This is added by utilities to support dental health in the community.
Consider a Filter for TDS
Total dissolved solids measure 313.333333 mg/L. A reverse osmosis filter can reduce dissolved minerals if you prefer a cleaner taste in drinking water.
Get water quality alerts
We'll email you when Cornwall's water data is updated.
FAQ
Frequently asked questions
Is tap water safe to drink in Cornwall?
How hard is the water in Cornwall?
What water utility supplies Cornwall?
Does Cornwall water have fluoride?
What is the water quality score for Cornwall?
What is the population of Cornwall?
Supplier
Water utility
- Utility
- TasWater
- Supply Zone
- Cornwall
- Data Source
- TasWater — Cornwall, St Marys
Nearby
Nearby suburbs
Same water utility, similar water quality
Similar Quality
Suburbs with similar water quality
Suburbs scoring between 8.5 and 10.0
Utility reports average the grid — not your home
Cornwall'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 Cornwall
Related
Explore more
Related pages for Cornwall, TAS
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.