Water quality data

Icon Water operates continuous monitoring systems at both Mount Stromlo and Googong Water Treatment Plants. In addition, a NATA-certified laboratory implements a comprehensive external monitoring program across both plants and the reticulation network, to ensure high quality drinking water is supplied to our customers. The typical composition of Canberra’s potable water supply is listed below, for more detail refer to the Annual Drinking Water Quality Report.

Water quality at customer taps*

Parameter

Units

ADWG Health Value

ADWG Aesthetic value

Customer taps Mean result

Chlorine

Free

mg/L

-

-

0.76


Total

mg/L

5

0.6

0.83

Colour

True

Pt-Co

-

15

2

E. coli


MPN/100mL

<1

-

<1

Fluoride


mg/L

1.5

-

0.75

pH


pH units

-

6.5-8.5

7.82

Turbidity


NTU

-

5

0.2

Alkalinity (total)


mg/L

-

-

47

Hardness (total)


mg/L

-

200

40.6

Iron


mg/L

-

0.3

<0.01

Manganese


mg/L

0.5

0.1

0.01

Copper


mg/L

2

1

0.015

Lead


mg/L

0.01

-

0.0003

Final treated water quality at Canberra’s Water Treatment Plants (WTPs)*

Parameter

Units

ADWG Health value

ADWG Aesthetic value

Mount Stromlo Mean result

Googong WTP Mean result

Chlorine

Free

mg/L

-

-

1.5

1.7

 

Total

mg/L

5

0.6

1.5

2

Colour

True

Pt-Co

-

15

1.9

2.3

Cryptosporidium

 

cells/L

-†

-

<0.008

<0.007

E. coli

 

MPN/100mL

<1

-

<1

<1

Fluoride

 

mg/L

1.5

-

0.71

0.72

Giardia

 

cells/L

-†

-

<0.0007

<0.007

pH

 

pH units

-

6.5-8.5

7.6

7.7

Turbidity

 

NTU

-

5

0.17

0.22

* based on 2018-19 data
- no current ADWG health or aesthetic value
† no health guideline has been set due to the lack of a routine method to identify human infectious strains in drinking water
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