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water quality in Christchurch


TM

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This is a email sent to me from the Christchurch City Council

On Wed 3rd November 2004.

Thought it may be of interest.

It shows the ave of the water quality in Christchurch

Hi Tim,

Water data as requested:

Also, the water at your Beckenham site is likely to have a variable pH due to variable water sources, aeration times etc. but typically this will be an average of 7 - 8. Phosphate <0.05ppm Reactive silica is 16ppm

At Stanmore Road the phosphate level is <0.05ppm Reactive silica is 20ppm pH is 7.8

Hope this helps,

Regards,

Gareth Phillips

A typical average analysis of Christchurch Water

pH: 7.8

pH after aeration: 8.2 g/m3

Acidity to pH 8.3 (as CO3): 1 g/m3

Total Alkalinity to pH 4.5 as HCO3: 52 g/m3

Turbidity (TU): Less than 1

Nitrate Nitrogen: 1 g/m3

Sulphate: 5.0 g/m3

Chloride: 5.0 g/m3

Calcium: 2.0 g/m3

Fluoride: Less than 0.1 g/m3

Magnesium: 1.5 g/m3

Potassium: 1.0 g/m3

Sodium: 6.1 g/m3

Reactive Silica (as SO2): 16.0 g/m3

Total Hardness (as CaCO3): 45 g/m3

Conductivity at 20ûC (ms/m): 10

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