View report page

Section C— Sanitary Circumstances.
Water Supply.
The greater part of the urban district is within the supply area
of the Sutton and District Water Company, some 170 dwellings only
in the extreme north being supplied by the Metropolitan Water Board.
On an agreed rota, water, as received by the consumer, is sampled
twice monthly as a routine by the Public Health Departments of the
constituents districts in the Company's supply area.
The normal sources of supply of the Company are chalk wells
situated at Cheam, Sutton and Woodmansterne. These can be supplemented,
when necessary, by water from the Metropolitan Water Board,
the Epsom and Ewell Corporation and the East Surrey Water Co.
The supply has been satisfactory in quality and quantity.
The following statement supplied by the Engineer shows the
extent of sampling carried out by the Water Company :—
No. of
Bacteriological
Examina
tions
No. of
Full
Chemical
Analyses
Presumptive
B. Coli present
in 100 cc. (excluding
types
1 & 2)
B. Coli present
in 100 cc.
(types 1 & 2)
No.
%
No.
%
Sutton Raw
307
40
12
4.0
19
6.0
Sutton Finished
315
41
42
13.0
13
4.0
Woodmansterne Raw
311
40
3
1.0
Nil
Nil
Woodmansterne Finished
313
40
1
0.3
Nil
Nil
Cheam Raw
308
47
6
2.0
4
1.3
Reservoir
231
Nil
1
0.4
1
0.4
District including New
Mains
301
22
11
4.0
5
1.7
The following detailed report of a sample taken by this Department
is fairly representative:—
Chemical analysis in parts per 100,000.
Total solid matter in solution (dried at 180° C.) 21.3
Combined chlorine 1.83
Nitric nitrogen 0.86
Nitrous nitrogen 0.002
Ammonia, free and saline 0.0040
Ammonia, albuminoid 0.0015
Oxygen absorbed from permanganate in 4 hours at 26.7° C. 0.010
Hardness—by acidimetric titration— Temporary 7.2
Permanent 6.5
Total 13.7
PH 7.5
36