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
Bromley 1949
[Report of the Medical Officer of Health for Bromley]
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Chemical. (Parts per million unless otherwise stated.)
| Short tar ds Well | West Wickham Well | Orpington Well | Thames-derived filtered water (Walton) | |
|---|---|---|---|---|
| Number of samples | 5 | 6 | 4 | 247 |
| Ammoniacal Nitrogen | .001 | .007 | .000 | .017 |
| Albuminoid Nitrogen | .038 | .022 | .025 | .093 |
| Oxidised Nitrogen—Nitrate | 4.7 | 4.6 | 7.5 | 4.6 |
| Chlorides as C1 | 22.3 | 13.2 | 16.1 | 28.8 |
| Oxygen abs. from Permanganate 3 hrs. at 80° F | .40 | .15 | .05 | 1.26 |
| Turbidity in terms of Silica | — | — | — | .3 |
| Colour, m.m. brown, 2 ft. tube, Burgess's Tintometer | 5 | 0 | 0 | 16 |
| Hardness (Total) | 261 | 260 | 283 | 238 |
| Hardness (Permanent) | 95 | 55 | 83 | 69 |
| pH Value | 7.3 | 7.1 | 7.1 | 7.6 |
| Phosphate as P.O. 111/4 | — | — | — | .36 |
| Silica | — | — | — | 12.5 |
| Conductivity | 450 | 400 | 450 | 450 |
| Bacteriological Results. | ||||
| Number of samples | 255 | 240 | 254 | 255 |
| No. of microbes per ml. Colonies counted on agar after 20-24 hours at 37° C | 20.8 | |||
| Bact. coli test: | ||||
| Percentage of samples negative to Bact. Coli in 100 ml | 99.2 | 100.0 | 100.0 | 100.0 |
| Bact. Coli per 100 ml | .016 | Nil. | Nil. | Nil. |
Drainage and Sewerage.
There have been no works of major importance carried out
during the year.
Cesspools.
No new premises have been erected with cesspool drainage
and no alterations to the drainage system of any other properties
on cesspool drainage have been carried out.
Cesspool emptying is undertaken by the Borough Engineer's
Department upon the request of the householders, a charge being
made of 17s. 6d. for the removal of the first 500 gallons and
12s. 6d. for subsequent or part loads.
Rivers, Streams and Lakes.
No further works of culverting rivers or streams within the
area have been undertaken during the year.
25 inspections and re-inspections were made by Sanitary
Inspectors during the year.