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 1963

[Report of the Medical Officer of Health for Yiewsley]

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Table: BACTERIOLOGICAL EXAMINATION

BACTERIOLOGICAL EXAMINATION

LocationTypeResidual Chlorine p.p.m.Colonies per ml 2 daysColonies per ml 3 daysBad. coli (Type 1) Probable number per 100 mlPresumptive Colicerogenes Probable number per 100 ml
West Drayton P.S.Treated water5000

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Sample No. : 62402. Date Taken : 10th April, 1954.
Remarks: This water is moderately hard in character and contains no excess of mineral or saline constituents.
It conforms to the highest standard of organic quality.

Table: CHEMICAL EXAMINATION

CHEMICAL EXAMINATION

Location:West Drayton Pumping Station.Raw or Treated :Treated
Colour:Nil Hazen.Chloride (C1)20 p.p.m.
Turbidity (Si02):Nil Hazen.Alkalinity (CaC03)230 p.p.m.
Odour:Nil.Hardness (CaC03) Carbonate215 p.p.m.
Taste:Normal.Non-CarbonateNil p.p.m.
pH:7.4.Total215 p.p.m.
Electrical Conductivity (20°C):480.Residual Chlorine (CI2).08 p.p.m.
Total Solids (180°C):325 p.p.m.Copper:Nil p.p m.
Nitrate (N)0.3 p.p.m.Iron:Nil p.p.m.
Nitrite (N).085 p.p.m.Zinc:Trace p.p.m.
Ammonia (N).120 p.p.m.
Albuminoid Nitrogen (N)Nil p.p.m.