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Samples of the raw and treated waters are examined daily by the
laboratory at the Sutton Works. Samples are also examined at monthly
intervals by the Company's Consultant Analyst, and copies of his reports
are received. Twenty four bacteriological and twelve chemical samples are
taken annually by the five District Councils in the area of supply (two
bacteriological and one chemical per month, in rotation). All samples
were satisfactory.
The supply from all sources has been satisfactory in guality and
quantity As regards the latter, the Water Engineer reports that the
quantity supplied by the Sutton District WaterCompany in 1963 was the
highest ever, just over thirty gallons per head of population per day being
supplied for domestic use and eight gallons per head per day for industrial
use. There were no restrictions on supply throughout the year, as indeed
has been the case throughout the hundred years' existence of the Company,
which held its Centenary Celebrations in June.
No action was necessary in respect of contamination during the year.
All the dwelling houses have a direct supply from the public mains, as
follows
(a) Twenty six thousand, two hundred and eighty six houses, with a
population of seventy eight thousand, seven hundred and sixty two, are
supplied to a tap directly into the house.
(b) Five houses, with a population of eight, are supplied by stand-pipes,
The Sutton District Water Company supply twenty five thousand, eight
hundred and forty eight dwellings, and the remaining four hundred and
thirty eight dwellings are supplied by the Metropolitan Water Board.
The following is an average monthly analysis:-
Chemical Results in Parts per Million Average
Appearance Bright with a slightly white deposit
of minute particles of calcium
carbonate.
Turbidity Less than 3
Colour Nil
Odour Normal
pH 8.5
Free Carbon Dioxide Absent
Electric Conductivity 290
Dissolved Solids dried at 180° C. 210
Chlorine present as Chloride 19
Alkalinity as Calcium Carbonate 55
Hardness (grains per gallon)-
Carbonate 3.9
Non-carbonate 4.2
Total 8.1
Nitrate Nitrogen 11
Nitrite Nitrogen Less than 0.01
Ammoniacal Nitrogen 0.14
Albuminoid Nitrogen 0.000
Oxygen Absorbed 0.20
Residual Chlorine 0.19
Metals - Iron, Zinc, Copper, Lead Absent
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