St Helens vs St Marys

Name: Water Quality Comparison: St Helens vs St Marys
Creator: WaterScore
License: https://creativecommons.org/licenses/by/4.0/

Side-by-side tap water quality comparison

St Marys, TAS

9.5

Quality Score

Supplied by TasWater

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Which suburb has better water?

It's very close! St Helens scores 9.6/10 and St Marys scores 9.5/10. Both suburbs have similar water quality based on ADWG compliance data.

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Recommended for this suburb

Chlorine in St Helens is 1.132424 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

St Helens, TAS

St Marys, TAS

Key metrics comparison

Hardness (mg/L)

St Helens

13.5 Lower

St Marys

153.333333 Higher

pH Level

St Helens

7.262424 Normal

St Marys

7.10697 Normal

Fluoride (mg/L)

St Helens

0.86 Lower

St Marys

0.943333 Higher

Chlorine (mg/L)

St Helens

1.132424 Higher

St Marys

0.792576 Lower

Full water quality comparison

All parameters compared against Australian Drinking Water Guidelines (ADWG)

Parameter	St Helens	St Marys	Unit	ADWG Guideline
Alkalinity	26.666667 Measured	146.666667 Measured	mg/L	No limit
Aluminium	0.0275 Good	0.01 Good	mg/L	< 0.2
Ammonia	0.002 Measured	0.002 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	3.325 Measured	55.5 Measured	mg/L	No limit
Chloride	18.25 Good	33 Good	mg/L	< 250
Chromium	0.001 Measured	0.001 Measured	mg/L	No limit
Colour	2.166667 Good	2.166667 Good	Pt-Co	< 15
Conductivity	180 Measured	411.666667 Measured	uS/cm	No limit
Copper	0.001875 Good	0.0115 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	0.86 Good	0.943333 Good	mg/L	< 1.5
Free Chlorine	1.132424 Good	0.792576 Good	mg/L	< 5
Hardness	13.5 Good	153.333333 Good	mg/L	< 200
Iron	0.01125 Good	0.0275 Good	mg/L	< 0.3
Lead	0.001125 Good	0.001 Good	mg/L	< 0.01
Magnesium	1.45 Measured	4.95 Measured	mg/L	No limit
Manganese	0.002625 Good	0.00325 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	0.239167 Good	0.007333 Good	mg/L	< 50
Nitrite	0.002 Measured	0.002 Measured	mg/L	No limit
pH	7.262424 Normal	7.10697 Normal	pH units	6.5 – 8.5
Sodium	29.5 Good	17 Good	mg/L	< 180
Sulfate	29.916667 Good	14.333333 Good	mg/L	< 500
Temperature	14.536364 Measured	13.442424 Measured	degrees C	No limit
Total Chlorine	1.234286 Good	1 Good	mg/L	< 5
Total Coliforms	0 Compliant	0 Compliant	MPN/100ml	< 0
Total Dissolved Solids	111.25 Good	231.666667 Good	mg/L	< 600
Trihalomethanes	0.03025 Good	0.0115 Good	mg/L	< 0.25
Turbidity	0.333636 Good	0.57303 Good	NTU	< 5
Zinc	0.002 Measured	0.0045 Measured	mg/L	No limit

Explore further

St Helens

St Marys

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.