[Report of the Medical Officer of Health for Carshalton] page 21

Carshalton 1962

[Report of the Medical Officer of Health for Carshalton]

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Section C—Sanitary Circumstances.
Water Supply
The district is supplied by the Sutton District Water Company with
the exception of some 200 dwellings at the northern end which are supplied
by the Metropolitan Water Board. The Company draws its supply from
wells in the chalk at Sutton, Cheam and Woodmansterne. Its own resources
can be augmented if the need arises by the Metropolitan Water Board, the
East Surrey Water Company and the Epsom and Ewell Corporation's
undertaking.
A few private wells exist in the district at the St. Helier Hospital,
the Muschamp Road and West Street laundries, at St. Philomena's School
and Convent and at the British Industrial Solvents in Mill Lane.
The public supply is softened to 9° of hardness which is a statutory
requirement and undergoes purification treatment including chlorination.
It is not plumbo solvent. The arrangements for purity control include the
employment of a full time chemist with a fully equipped laboratory who
exercises daily check both on the raw and finished waters. Tests are also
carried out periodically for the Company by a firm of independent water
chemists. In addition the Public Health Departments of the Districts in the
supply area take monthly samples on an agreed rota.
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Table: As the results of the tests indicate, the supply was completely wholesome. It was also adequate although the use of water continues to increase. The following information supplied by courtesy of the Company gives the results of their laboratory work.

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As the results of the tests indicate, the supply was completely wholesome. It was also adequate although the use of water continues to increase. The following information supplied by courtesy of the Company gives the results of their laboratory work.

Sample	Total No. of Bacteriological Examinations	Total No. of full Chemical Analyses	No. and % of samples showing Coli-Aerogenes in 100 ml. (Excluding B.Coli 1)		No. and % of samples showing B. Coli present in 100 ml. of sample (Type 1)		Total No. Coli-Aero-genes Organisms in 100 ml. of sample
Sample	Total No. of Bacteriological Examinations	Total No. of full Chemical Analyses	No.	%	No.	V /o	Total No. Coli-Aero-genes Organisms in 100 ml. of sample
Sutton Raw	307	53	10	3.1	5	1.6	15
Sutton Finished	310	14	3	1.0	2	0.7	5
Woodmansterne Raw	310	53	2	0.7	Nil	Nil	2
Woodmansterne Finished	318	12	3	0.9	Nil	Nil	3
Cheam	309	53	20	6.5	17	5.5	37
Reservoir	292	4	4	1.4	Nil	Nil	4
District	302	7	10	3.3	4	1.3	14
Total	2,148	196	52		28		80

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

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Carshalton 1962

Text

Table: As the results of the tests indicate, the supply was completely wholesome. It was also adequate although the use of water continues to increase. The following information supplied by courtesy of the Company gives the results of their laboratory work.