London's Pulse: Medical Officer of Health reports 1848-1972
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Hints from the Health Department. Leaflet from the archive of the Society of Medical Officers of Health. Credit: Wellcome Collection, London
Lewisham 1966
[Report of the Medical Officer of Health for Lewisham Borough]
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Table 63
Average results of the chemical and bacteriological examination of the water supply to the Borough of Lewisham for 1966
Milligrammes per litre (unless otherwise stated)
Description of the Sample
Number
of
Samples
Day
of
the
month
Ammoniacal
Nitrogen
Albuminoid
Nitrogen
Nitrate
Nitrogen
Oxygen
abs.
from
KMnO4
4 hrs.
at
27°C.
Hardness
(total)
Ca CO 3
Hardness
noncarbonate
CaCO3
Magnesium
as Mg
Chloride
as CI
Phosphate
as
PO4
Silicate
as
SiO4
Sulphate
as
SO4
Natural
Fluoride
as F
Surfaceactive
material
as
Manoxol
OT
Turbidity
units
Colour
(Burgess
units)
PH
value
Electrical
Conductivity
(micromhos)
Bexley
4
0.005
0.038
4.9
0.13
323
69
4
19
17
58
Nil
1
7.1
580
Darenth
4
0.012
0.041
4.6
0.11
273
42
2
18
14
24
0.2
1
7.1
510
Deptford
4
0.013
0.040
5.9
0.20
389
126
9
43
16
122
0.1
3
7.0
740
Wilmington
4
0.008
0.049
7.5
0.35
303
67
2
25
16
30
0.1
2
7.1
570
Merton Abbey
Not in supply during the year.
All Thames
derived
363
0.030
0.088
4.1
1.26
285
78
5
32
1.7
8
64
0.20
0.01
0.1
15
7.9
570