Is Tap Water Safe to Drink in Cornwall, TAS?
Postcode 7215 · Supplied by TasWater · Current data · annual report
ADWG compliance check
Each parameter tested against Australian Drinking Water Guidelines
| 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 |
What's in your water
Key parameters explained in plain English
Water Hardness
At 142.857143 mg/L, Cornwall's water is classified as hard. You may notice some limescale buildup in kettles and appliances. The ADWG aesthetic guideline is 200 mg/L.
pH Level
pH of 7.653387 is within the safe range of 6.5–8.5. Water outside this range may taste metallic or cause pipe corrosion.
Fluoride
Fluoride measured at 0.943333 mg/L. Within the recommended 0.6–1.1 mg/L range for dental health.
Chlorine (Disinfection)
Chlorine at 0.787581 mg/L (ADWG limit: 5 mg/L). Used to kill harmful bacteria and ensure water stays safe in the pipes. May affect taste — a carbon filter or refrigerating water can reduce chlorine.
E. coli
No E. coli detected — the water meets the ADWG standard of zero E. coli per 100 mL. This indicates effective disinfection.
About your water supply
- Water Utility
- TasWater
- Supply Zone
- Cornwall
Frequently asked questions
Is Cornwall tap water safe?
What contaminants are in Cornwall water?
Should I filter my tap water in Cornwall?
Guides for Hobart and Tasmania
In-depth articles on the water supply that serves Cornwall
Learn more about water in Cornwall
Is tap water safe in nearby suburbs?
Safety assessments for suburbs on the same water supply
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.
Recommended water filters for Cornwall
Based on Cornwall's water profile — matched to the parameters tested above
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.
Important disclaimer: The safety assessment on this page is for general informational purposes only and does not constitute medical advice, health recommendations, or a guarantee of water safety. Our assessment is based on comparison against Australian Drinking Water Guidelines (ADWG) using data from TasWater (annual report). This data reflects conditions at the time of utility testing and may not reflect real-time water quality at your specific tap. Water quality can be affected by local plumbing, building age, seasonal variations, and other factors not captured in utility reports. If you have health concerns about your drinking water, please consult a qualified health professional or contact your local water utility directly. See our Terms of Use.