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
Yiewsley and West Drayton 1962
[Report of the Medical Officer of Health for Yiewsley]
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| Location | Type | Residual Chlorine p.p.m. | Colonies per ml 2 days | Colonies per ml 3 days | Bad. coli (Type 1) Probable number per 100 ml | Presumptive Coliaerogenes Probable number per 100 ml |
|---|---|---|---|---|---|---|
| West Drayton P.S. | Treated water | 3 | 1 | 0 | 0 |
Sample No.: 54,000 Date Taken: 9th November, 1962.
Remarks: This water is moderately hard in character but contains no excess of mineral or saline constituents in
solution. It conforms to the highest standards of bacterial and organic purity.
CHEMICAL EXAMINATION
Location West Drayton Pumping Station Raw or Treated: Treated
Colour: Nil Hazen Chloride (C1) 20p.p.m.
Turbidity (Si02) Nil p.p.m. Alkalinity (CaC03) 240 p.p.m.
Odour: Nil Hardness (CaC03) Carbonate 210 p.p.m.
Taste: Normal Non-Carbonate Nil p.p.m.
pH: 7.7 Total 210 p.p.m.
Electrical Conductivity (20°C) 475 Residual Chlorine (C12) .13 p.p.m.
Total Solids (180°C) 345 p.p.m. Copper .01 p.p.m.
Nitrate (N) .3 p.p.m. Iron .02 p.p.m.
Nitrite (N) .031 p.p.m. Zinc Nil p.p.m.
Ammonia (N) .107 p.p.m.
Albuminoid Nitrogen (N) .002 p.p.m.
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