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
Feltham 1959
[Report of the Medical Officer of Health for Feltham]
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10
Bacteriological
Agar Plate Count (per ml.)
Colonies counted at 37 °C (20-24 hours) 6.7
Coliform count (percentage of samples negative in 100 ml.) 100.0
E-coli count (percentage of samples negative in 100 ml.) 100 0
| Appearance | Clear and bright | |||
| Turbidity | Less than 1 | |||
| Colour | 5 | |||
| Odour | Slightly chlorinous | |||
| pH | 7.6 | |||
| Free Carbon Dioxide | 10 | |||
| Electric Conductivity | 525 | |||
| Total Solids | 350 | |||
| Chlorine present as Chloride | 30 | |||
| Alkalinity as Calcium Carbonate | 215 | |||
| Hardness: Total | 255 | |||
| (Carbonate 215; Non-Carbonate 40) | ||||
| Nitrate Nitrogen | 2.8 | |||
| Nitrite Nitrogen | absent | |||
| Ammoniacal Nitrogen | 0.010 | |||
| Albuminoid Nitrogen | 0.036 | |||
| Oxygen Absorbed | 0.60 | |||
| Residual Chlorine | 0.05 | |||
| Metals | absent | |||
| Bacteriological | ||||
| Number of Colonies developing on Agar | 1 day at 37°C. | 2 days at 37°C. | 3 days at 20 °C. | |
| 0 per ml. | 2 per ml. | 12 per ml. | ||
| Present in | Absent from | Probable number | ||
| Presumptive Coli- aerogenes Reaction | — ml. | 100 ml. | 0 per 100 ml. | |
| Bact. coli (Type 1) | — ml. | 100 ml. | 0 per 100 ml. | |
| Cl. welchii Reaction | — ml. | 100 ml. | ||
The water supplied had no plumbo-solvent action but
samples were tested for presence of metals.
No action was required in respect of contamination of
the water. All water was chlorinated before distribution and
all new and repaired mains were chlorinated before being
restored to use.
With the exception of two condemned but occupied
cottages, all the houses in the area were supplied from the
public water mains.