[Report of the Medical Officer of Health for Lambeth Borough] page 106

Lambeth 1971

[Report of the Medical Officer of Health for Lambeth Borough]

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BACTERIOLOGICAL RESULTS - YEARLY AVERAGES, 1971

of the Water Supplied to the London Borough of Lambeth

BEFORE TREATMENT								AFTER TREATMENT
	Number of samples	Agar plate count per ml.		Coliform count		Escherichia coli count		Number of samples	Agar plate count per ml.		Coliform count	E. Coli count
Source of supply	Number of samples	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	Number of samples	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.
River Thames — derived	8,154	53.9		40.37	12.2	54.91	5.1	3901	8.4		99.51	99.97
Honor Oak	62	0.0	7	87.10	0.4	88.71	0.2	63	0.2	19	100.0	100.0