Gunns Plains vs Upper Castra

Name: Water Quality Comparison: Gunns Plains vs Upper Castra
Creator: WaterScore
License: https://creativecommons.org/licenses/by/4.0/

Side-by-side tap water quality comparison

Upper Castra, TAS

9.7

Quality Score

Supplied by TasWater

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Which suburb has better water?

It's very close! Gunns Plains scores 9.6/10 and Upper Castra scores 9.7/10. Both suburbs have similar water quality based on ADWG compliance data.

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Recommended for this suburb

Chlorine in Gunns Plains is 1.168438 mg/L — that's high. It's why your tap water smells like a pool.

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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A BRITA Marella is the opposite: fast (2.4L, fills in under a minute), kid-friendly handle, fridge-door fit, replacement cartridges available everywhere in AU. Chlorine gone, taste clean, no plumber, no faff — this is the default answer for chlorine taste in Australia.

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Visual comparison

Gunns Plains, TAS

Upper Castra, TAS

Key metrics comparison

Hardness (mg/L)

Gunns Plains

57.416667 Higher

Upper Castra

25.909091 Lower

pH Level

Gunns Plains

7.246875 Normal

Upper Castra

7.326645 Normal

Fluoride (mg/L)

Gunns Plains

0.85 Lower

Upper Castra

0.886667 Higher

Chlorine (mg/L)

Gunns Plains

1.168438 Higher

Upper Castra

1.062859 Lower

Full water quality comparison

All parameters compared against Australian Drinking Water Guidelines (ADWG)

Parameter	Gunns Plains	Upper Castra	Unit	ADWG Guideline
Alkalinity	26.428571 Measured	6.30303 Measured	mg/L	No limit
Aluminium	0.0325 Good	0.025385 Good	mg/L	< 0.2
Ammonia	0.002 Measured	0.002061 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	19.25 Measured	9.269231 Measured	mg/L	No limit
Chloride	11 Good	7.461538 Good	mg/L	< 250
Chromium	0.001 Measured	0.001 Measured	mg/L	No limit
Colour	2.083333 Good	2.121212 Good	Pt-Co	< 15
Conductivity	172.142857 Measured	83.151515 Measured	uS/cm	No limit
Copper	0.001875 Good	0.004 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	0.85 Good	0.886667 Good	mg/L	< 1.5
Free Chlorine	1.168438 Good	1.062859 Good	mg/L	< 5
Hardness	57.416667 Good	25.909091 Good	mg/L	< 200
Iron	0.0125 Good	0.013077 Good	mg/L	< 0.3
Lead	0.001 Good	0.001038 Good	mg/L	< 0.01
Magnesium	2.15 Measured	1.015385 Measured	mg/L	No limit
Manganese	0.001625 Good	0.002885 Good	mg/L	< 0.1
Mercury	0.0001 Measured	0.000104 Measured	mg/L	No limit
Nickel	0.001 Measured	0.001 Measured	mg/L	No limit
Nitrate	0.1855 Good	0.068303 Good	mg/L	< 50
Nitrite	0.002 Measured	0.002 Measured	mg/L	No limit
pH	7.246875 Normal	7.326645 Normal	pH units	6.5 – 8.5
Sodium	5.075 Good	3.407692 Good	mg/L	< 180
Sulfate	30.928571 Good	15.242424 Good	mg/L	< 500
Temperature	14.54375 Measured	14.207188 Measured	degrees C	No limit
Total Chlorine	1.361429 Good	1.277273 Good	mg/L	< 5
Total Coliforms	0 Compliant	0 Compliant	MPN/100ml	< 0
Total Dissolved Solids	91.916667 Good	55.333333 Good	mg/L	< 600
Trihalomethanes	0.027 Good	0.045692 Good	mg/L	< 0.25
Turbidity	0.412125 Good	0.349569 Good	NTU	< 5
Zinc	0.004 Measured	0.006538 Measured	mg/L	No limit

Explore further

Gunns Plains

Upper Castra

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.