London's Pulse: Medical Officer of Health reports 1848-1972

View report page

Hints from the Health Department. Leaflet from the archive of the Society of Medical Officers of Health. Credit: Wellcome Collection, London

Richmond upon Thames 1970

[Report of the Medical Officer of Health for Richmond upon Thames]

This page requires JavaScript

Table: AVERAGE RESULTS OF THE CHEMICAL EXAMINATIONof the water supplied to the London Borough of Richmond uponThames during 1970. Milligrammes per litre (unless otherwise stated).

AVERAGE RESULTS OF THE CHEMICAL EXAMINATIONof the water supplied to the London Borough of Richmond upon

Thames during 1970. Milligrammes per litre (unless otherwise stated).

Description of the SampleNumber of SamplesAmmoniacal NitrogenAlbuminoid NitrogenNitrate NitrogenOxygen abs. from KMnO44 hrs. at 27° C.B.O.D 5 days at 20° C.Hardness (total) CaC03Hardness (non-carbonate) CaC03Magnesium as MgSodium as NaPotassium as KChloride as ClPhosphate as P04Silicate as Sl02Sulphate as SO4Natural Fluoride as FSurface-active material as Manoxol OTTurbidity unitsColour (Burgess units)pH valueElectrical Conductivity (micromhos)
(1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23)
Hampton520.0100.0854.81.0327079527.65.6402.79700.200.030.1127.9580

Table: BACTERIOLOGICAL RESULTS — YEARLY AVERAGES,1970

BACTERIOLOGICAL RESULTS — YEARLY AVERAGES,1970

Source of supplyBEFORE TREATMENTAFTER TREATMENT
Number of samplesAgar plate count per ml.Coliform countEscherichia coli countNumber of samplesAgar plate count per ml.Coliform countE. coli count
20-24 hours at 37° C.3 days at 22° C.Per cent, samples negative in 100 ml.Count per 100 ml.Per cent, samples negative in 100 ml.Count per 100 ml.20-24 hours at 37° C.3 days at 22° C.Per cent. samples negative in 100 ml.Per cent. samples negative in 100 ml.
Hampton1,96919.440.5820.254.145.91,1598.1100.0100.0