Karratha vs Southport

Side-by-side tap water quality comparison

Karratha, WA

Quality Score

Supplied by Water Corporation

Southport, QLD

Quality Score

Supplied by Seqwater

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Which suburb has better water?

Karratha has better water quality with a score of 9.6/10 compared to Southport's 9.0/10. Southport has softer water (33.9 vs 54 mg/L).

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

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Visual comparison

HardnesspHFluorideTurbidity
Karratha, WA
Southport, QLD

Key metrics comparison

Hardness (mg/L)

Karratha

54 Higher

Southport

33.9 Lower

pH Level

Karratha

7.85 Normal

Southport

6.2 Outside range

Fluoride (mg/L)

Karratha

0.1 Lower

Southport

0.81 Higher

Chlorine (mg/L)

Karratha

—

Southport

1.7

Full water quality comparison

All parameters compared against Australian Drinking Water Guidelines (ADWG)

Parameter Karratha Southport Unit ADWG Guideline
Alkalinity 49 Measured 29.5 Measured mg/L CaCO3 No limit
Aluminium 0.008 Good 0.013 Good mg/L < 0.2
Arsenic — 0.0005 Measured mg/L No limit
Bromate — 0.005 Measured mg/L No limit
Cadmium — 0.0001 Measured mg/L No limit
Calcium — 12.5 Measured mg/L No limit
Chlorate — 0.066 Measured mg/L No limit
Chloride 42 Good 25.7 Good mg/L < 250
Chromium — 0.001 Measured mg/L No limit
Colour 1 Good 1.3 Good HU < 15
Conductivity — 197.5 Measured µS/cm No limit
Copper — 0.001 Good mg/L < 2
E. coli — 0 Compliant CFU/100mL < 0
Fluoride 0.1 Good 0.81 Good mg/L < 1.5
Free Chlorine — 1.7 Good mg/L < 5
Hardness 54 Good 33.9 Good mg/L CaCO3 < 200
Iron 0.009 Good 0.01 Good mg/L < 0.3
Lead — 0.001 Good mg/L < 0.01
Magnesium — 0.7 Measured mg/L No limit
Manganese 0.005 Good 0.001 Good mg/L < 0.1
Mercury — 0.0001 Measured mg/L No limit
Ndma — 0.003 Measured µg/L No limit
Nickel — 0.001 Measured mg/L No limit
Nitrate 0.44 Good — mg/L < 50
pH 7.85 Normal 6.2 Outside range pH units 6.5 – 8.5
Sodium 21 Good 18.3 Good mg/L < 180
Sulfate 0.15 Good — mg/L < 500
Temperature — 25 Measured °C No limit
Total Chlorine — 1.6 Good mg/L < 5
Total Dissolved Solids 157 Good — mg/L < 600
Trihalomethanes 0.052 Good 0.0396 Good mg/L < 0.25
Turbidity 0.1 Good 0.3 Good NTU < 5
Zinc — 0.005 Measured mg/L No limit

Explore further

Karratha

Southport

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