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
Paddington 1890
[Report of the Medical Officer of Health for Paddington]
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193
TABLE A.
Taking the mean proportion of organic impurity in the Thames
water delivered in London in 1868 as 1,000, in the subsequent
years the following proportions were present respectively in the
Thames water, in the Lea water, and in the Deep Well water.
Year.
Proportion of
organic impurity
present in Thames
water as delivered
in London.
Proportion of
organic impurity
present in Lea water
as delivered in
London.
Proportion of
organic impurity
present in Deep
Well water as
delivered in London.
1868
1,000
484
254
1869
1,016
618
312
1870
795
550
246
1871
928
604
150
1872
1,243
819
221
1873
917
693
250
1874
933
583
287
1875
1,030
751
250
1876
903
562
246
1877
907
596
243
1878
1,056
747
323
1879
1,165
947
387
1880
1,254
1,013
393
1881
993
765
405
1882
1,033
711
409
1883
850
620
321
1884
723
500
264
1885
839
603
200
1886
756
500
244
1887
690
473
249
1888
722
506
241
1889
677
504
268
1890
680
432
252