Joanna vs Mount Light

Name: Water Quality Comparison: Joanna vs Mount Light
Creator: WaterScore
License: https://creativecommons.org/licenses/by/4.0/

Side-by-side tap water quality comparison

Mount Light, SA

7.5

Quality Score

Supplied by SA Water

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Which suburb has better water?

Joanna has better water quality with a score of 8.5/10 compared to Mount Light's 7.5/10. Mount Light has softer water (355 vs 372 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

Joanna's tap water is 'very hard' at 372 mg/L — and scale is building up in your home right now.

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Visual comparison

Joanna, SA

Mount Light, SA

Key metrics comparison

Hardness (mg/L)

Joanna

372 Higher

Mount Light

355 Lower

pH Level

Joanna

0.05 Outside range

Mount Light

0.05 Outside range

Fluoride (mg/L)

Joanna

0.1 Lower

Mount Light

1.1 Higher

Chlorine (mg/L)

Joanna

0.9 Same

Mount Light

0.9 Same

Full water quality comparison

All parameters compared against Australian Drinking Water Guidelines (ADWG)

Parameter	Joanna	Mount Light	Unit	ADWG Guideline
Alkalinity	369 Measured	317 Measured	mg/L	No limit
Aluminium	0.003 Good	0.001 Good	mg/L	< 0.2
Calcium	128 Measured	61.2 Measured	mg/L	No limit
Chloride	141 Good	458 Exceeds	mg/L	< 250
Colour	1 Good	1 Good	HU	< 15
Copper	0.0158 Good	0.2176 Good	mg/L	< 2
E. coli	0 Compliant	0 Compliant	cfu/100mL	< 0
Fluoride	0.1 Good	1.1 Good	mg/L	< 1.5
Free Chlorine	0.9 Good	0.9 Good	mg/L	< 5
Hardness	372 Exceeds	355 Exceeds	PPM or mg/L	< 200
Iron	0.0009 Good	0.103 Good	mg/L	< 0.3
Lead	0.0014 Good	0.0006 Good	mg/L	< 0.01
Magnesium	12.4 Measured	49.1 Measured	mg/L	No limit
Manganese	0.0001 Good	0.0233 Good	mg/L	< 0.1
Nitrate	7.62 Good	0.12 Good	mg/L	< 50
pH	0.05 Outside range	0.05 Outside range	µg/L	6.5 – 8.5
Sodium	82.3 Good	326 Exceeds	mg/L	< 180
Sulfate	24.8 Good	129.8 Good	mg/L	< 500
Total Dissolved Solids	665 Exceeds	—	mg/L	< 600
Turbidity	0.1 Good	0.48 Good	NTU	< 5

Explore further

Joanna

Mount Light

Disclaimer: This comparison is for general informational purposes only and does not constitute medical advice or professional guidance. Data is sourced from SA Water. 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.