Water quality data

Typical physical and chemical composition of Canberra’s drinking water

Parameter

Units

ADWG Health Criteria

ADWG Aesthetic Criteria

Minimum Concentration

Maximum Concentration

Mean Concentration

Alkalinity (total)

mg/L

-

-

27

49

38

Colour (true)

Pt-Co

-

15

<1

3

<1

Copper (total)

mg/L

2

10.7

<0.001

0.128

0.013

E. coli

MPN/100mL

<1

-

<1

<1

<1

Fluoride

mg/L

1.5

-

0.4

0.9

0.7

Hardness (total)

mg/L

-

200

27.0

56.0

36.7

Iron (total)

mg/L

-

0.3

<0.01

0.18

<0.01

Lead (total)

mg/L

0.01

-

<0.0002

0.0077

0.0003

Manganese (total)

mg/L

0.5

0.1

<0.001

0.117

0.007

pH

pH units

-

6.5 - 8.5

7.40

8.89

7.76

Turbidity

NTU

-

5

<0.1

2.3

0.3

 
These values are based on water quality data reported for 2016-2017.

ADWG: Australian Drinking Water Guidelines (2011)

MPN/100 mL: most probable number per 100 millilitres

mg/L: milligrams per litre

Pt-Co: platinum-cobalt units

NTU: nephelometric turbidity units

- no ADWG guideline value set

Water Quality at Canberra’s Water Treatment Plants (WTPs)

Parameter

 

Units

 

ADWG Health value

 

ADWG Aesthetic value

Mount Stromlo WTP

Mean Result

Googong WTP

Mean Result

Chlorine

Free

mg/L

-

-

1.38

1.79

 

Total

mg/L

5

0.6

1.42

1.97

Cryptosporidium

cells/L

-

-

<0.01

<0.008

E. coli

MPN/100 mL

<1

-

<1

<1

Fluoride

mg/L

1.5

-

0.7

0.7

Giardia

cells/L

-

-

<0.01

<0.008

pH

pH units

-

6.5-8.5

7.54

7.52

Turbidity

NTU

-

5

0.19

0.27

 

These values are based on water quality data reported for 2016-2017.

ADWG: Australian Drinking Water Guidelines (2011)

mg/L: milligrams per litre

MPN/100 mL: most probable number per 100 millilitres

- no ADWG guideline value set