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East Surrey Sutton & District Old Coulsdon
Water Co.'s Water Co.'s Estate
supply. supply. supply.
Suspended solids nil nil nil
Dissolved solids 22.76 21.20 37.8
Chlorine (as Cl2) 1.6 1.3 1.5
Free Ammonia 0.0015 0.0015 0.0075
Albumoid Ammonia 0.0015 0.0015 0.004
Nitrate (as N2) 0.74 0.66 0.85
Nitrite nil trace nil
Oxygen consumed from Permangate
(4 hours at 80° F.) 0.0032 0.025 0.0032
pH value 7.6 7.5 7.8
Temporary hardness 2.7 5.7 20.56
Permanent hardness 3.1 2.2 4.86
Physical Examination clear, clear, clear,
colourless, colourless, colourless,
odourless. odourless. odourless.
RAINFA1X.
During the year the rainfall was 26.98 inches, this being 10.85 inches
lower than the previous year, and occurred as follows:—
Inches.
January 3.42
February .78
March .41
April .20
May 2.63
June .59
July 2.12
August 2.88
September 2.81
October 3.48
November 4.02
December 3.64
26.98
These measurements were registered by the rain guage under the
observation of the Surveyor's Department, to which Department I
am indebted for this information.
DRAINAGE AND SEWERAGE.
The following extensions to the public sewers were made during
the year:—
Caterham Drive 480 yards
Waddington Avenue 650 yards
Shirley Avenue 430 yards
Keston Avenue 350 yards
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