Cornelian Bay vs Derwent Park

Name: Water Quality Comparison: Cornelian Bay vs Derwent Park
Creator: WaterScore
License: https://creativecommons.org/licenses/by/4.0/

Side-by-side tap water quality comparison

Derwent Park, TAS

9.6

Quality Score

Supplied by TasWater

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Which suburb has better water?

Derwent Park has better water quality with a score of 9.6/10 compared to Cornelian Bay's 9.1/10. Cornelian Bay has softer water (23.62963 vs 29.538462 mg/L).

Based on ADWG compliance across all measured parameters. Both suburbs receive treated, safe drinking water.

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Recommended for this suburb

Chlorine in Derwent Park is 0.866797 mg/L — above the taste threshold. That pool smell in every glass is real.

Chlorine is added on purpose (kills bugs in the pipes), but by the time it reaches your tap it ruins everything you taste. Tea takes on a medicinal edge. Kids turn down water and drink juice or soft drink instead. The usual family fix is bottled water, but a simple carbon filter is the cleaner daily habit. Worse, many filter pitchers go in the fridge and get ignored because they're slow.

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Visual comparison

Cornelian Bay, TAS

Derwent Park, TAS

Key metrics comparison

Hardness (mg/L)

Cornelian Bay

23.62963 Lower

Derwent Park

29.538462 Higher

pH Level

Cornelian Bay

7.093328 Normal

Derwent Park

7.272285 Normal

Fluoride (mg/L)

Cornelian Bay

0.928333 Higher

Derwent Park

0.92 Lower

Chlorine (mg/L)

Cornelian Bay

0.815378 Lower

Derwent Park

0.866797 Higher

Full water quality comparison

All parameters compared against Australian Drinking Water Guidelines (ADWG)

Parameter	Cornelian Bay	Derwent Park	Unit	ADWG Guideline
Alkalinity	11.655172 Measured	13.071429 Measured	mg/L	No limit
Aluminium	0.027727 Good	0.042 Good	mg/L	< 0.2
Ammonia	0.002069 Measured	0.002286 Measured	mg/L	No limit
Antimony	0.001 Measured	0.001 Measured	mg/L	No limit
Arsenic	0.001 Measured	0.001 Measured	mg/L	No limit
Cadmium	0.0002 Measured	0.0002 Measured	mg/L	No limit
Calcium	8.218182 Measured	9.08 Measured	mg/L	No limit
Chloride	9.454545 Good	8.4 Good	mg/L	< 250
Chromium	0.001 Measured	0.001 Measured	mg/L	No limit
Colour	2.642857 Good	2.285714 Good	Pt-Co	< 15
Conductivity	75.827586 Measured	93.785714 Measured	uS/cm	No limit
Copper	0.009318 Good	0.0263 Good	mg/L	< 2
Cyanide	0.005 Measured	0.005 Measured	mg/L	No limit
E. coli	0 Compliant	0 Compliant	MPN/100ml	< 0
Fluoride	0.928333 Good	0.92 Good	mg/L	< 1.5
Free Chlorine	0.815378 Good	0.866797 Good	mg/L	< 5
Hardness	23.62963 Good	29.538462 Good	mg/L	< 200
Iron	0.02 Good	0.017 Good	mg/L	< 0.3
Lead	0.001 Good	0.001 Good	mg/L	< 0.01
Magnesium	1.336364 Measured	1.28 Measured	mg/L	No limit
Manganese	0.002045 Good	0.0015 Good	mg/L	< 0.1
Mercury	0.0001 Measured	0.0001 Measured	mg/L	No limit
Nickel	0.001 Measured	0.001 Measured	mg/L	No limit
Nitrate	0.036897 Good	0.02895 Good	mg/L	< 50
Nitrite	0.002 Measured	0.002 Measured	mg/L	No limit
pH	7.093328 Normal	7.272285 Normal	pH units	6.5 – 8.5
Sodium	3.572727 Good	3.9 Good	mg/L	< 180
Sulfate	8.344828 Good	13.071429 Good	mg/L	< 500
Temperature	13.052234 Measured	13.452148 Measured	degrees C	No limit
Total Chlorine	1.214444 Good	1.304615 Good	mg/L	< 5
Total Coliforms	4.790469 Detected	0 Compliant	MPN/100ml	< 0
Total Dissolved Solids	49.148148 Good	62.307692 Good	mg/L	< 600
Trihalomethanes	0.022818 Good	0.0256 Good	mg/L	< 0.25
Turbidity	0.715031 Good	0.378691 Good	NTU	< 5
Zinc	0.004091 Measured	0.0024 Measured	mg/L	No limit

Explore further

Cornelian Bay

Derwent Park

Disclaimer: This comparison is for general informational purposes only and does not constitute medical advice or professional guidance. Data is sourced from TasWater. Values shown are based on the most recent published water quality reports and may not reflect real-time conditions at your tap. Water quality can vary due to local plumbing, seasonal changes, and other factors. For specific health concerns, consult a qualified health professional or contact your local water utility. See our Terms of Use.