[Report of the Medical Officer of Health for Chislehurst]
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Table: Average Results of the Chemical and Bacteriological Examination of the Water Supply to Chislehurst andSidcup during 1954.Parts per Million (unless otherwise stated).
Average Results of the Chemical and Bacteriological Examination of the Water Supply to Chislehurst andSidcup during 1954.
Parts per Million (unless otherwise stated).
Orpington Well
North Orpington Well
Short-lands Well
Eynsford Well
Bexley Well
Wilmington Well
Darenth Well
Thames derived filtered water
Number of samples
4
4
4
4
3
8
4
1585
Ammoniacal Nitrogen
0.003
0.004
0.004
0.003
0.007
0.006
0.003
0.021
Albuminoid Nitrogen
0.020
0.019
0.024
0.025
0.025
0.025
0.018
0.092
Oxidised Nitrogen—Nitrite
—
—
—
—
—
—
—
—
Oxidised Nitrogen—Nitrate
6.1
4.6
5.4
3.6
4.8
7.2
5.3
3.9
Chlorides as Cl
15.4
13.8
18.5
14.6
16.0
16.6
15.4
26.7
Oxygen abs. from Permanganate 4 hrs. at 27°C.
0.10
0.08
0.14
0.05
0.13
0.11
0.07
1.20
Turbidity in terms of Silica
Nil
0.3
Nil
Nil
Nil
Nil
Nil
0.3
Colour, m.m. brown 2 ft. tube, Burgess's Tintometer
