Mount Gambier vs Ob Flat

Name: Water Quality Comparison: Mount Gambier vs Ob Flat
Creator: WaterScore
License: https://creativecommons.org/licenses/by/4.0/

Side-by-side tap water quality comparison

Ob Flat, SA

8.8

Quality Score

Supplied by SA Water

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Which suburb has better water?

It's very close! Mount Gambier scores 8.8/10 and Ob Flat scores 8.8/10. Both suburbs have similar water quality based on ADWG compliance data.

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Recommended for this suburb

Mount Gambier's water is hard at 183 mg/L — you're cleaning scale off things that shouldn't need cleaning.

At this level, you'll see white rings inside the kettle, cloudy spots on glassware, and shampoo that never lathers properly. Over 5–10 years, scale slowly kills heating elements in your hot water system and dishwasher — the damage is invisible until they fail 2–3 years early. Boiling doesn't help; it concentrates the minerals.

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Visual comparison

Mount Gambier, SA

Ob Flat, SA

Key metrics comparison

Hardness (mg/L)

Mount Gambier

183 Same

Ob Flat

183 Same

pH Level

Mount Gambier

0.05 Outside range

Ob Flat

0.05 Outside range

Fluoride (mg/L)

Mount Gambier

0.9 Same

Ob Flat

0.9 Same

Chlorine (mg/L)

Mount Gambier

1.1 Same

Ob Flat

1.1 Same

Full water quality comparison

All parameters compared against Australian Drinking Water Guidelines (ADWG)

Parameter	Mount Gambier	Ob Flat	Unit	ADWG Guideline
Alkalinity	172 Measured	172 Measured	mg/L	No limit
Aluminium	0.001 Good	0.001 Good	mg/L	< 0.2
Calcium	42 Measured	42 Measured	mg/L	No limit
Chloride	80 Good	80 Good	mg/L	< 250
Colour	1 Good	1 Good	HU	< 15
Copper	0.0159 Good	0.0159 Good	mg/L	< 2
E. coli	0 Compliant	0 Compliant	cfu/100mL	< 0
Fluoride	0.9 Good	0.9 Good	mg/L	< 1.5
Free Chlorine	1.1 Good	1.1 Good	mg/L	< 5
Hardness	183 Near limit	183 Near limit	PPM or mg/L	< 200
Iron	0.0009 Good	0.0009 Good	mg/L	< 0.3
Lead	0.0004 Good	0.0004 Good	mg/L	< 0.01
Magnesium	18.8 Measured	18.8 Measured	mg/L	No limit
Manganese	0.0001 Good	0.0001 Good	mg/L	< 0.1
Nitrate	13.87 Good	13.87 Good	mg/L	< 50
pH	0.05 Outside range	0.05 Outside range	µg/L	6.5 – 8.5
Sodium	53.6 Good	53.6 Good	mg/L	< 180
Sulfate	14.6 Good	14.6 Good	mg/L	< 500
Total Chlorine	1.1 Good	1.1 Good	mg/L	< 5
Total Dissolved Solids	363 Good	363 Good	mg/L	< 600
Turbidity	0.13 Good	0.13 Good	NTU	< 5

Explore further

Mount Gambier

Ob Flat

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.