[Report of the Medical Officer of Health for Lewisham Borough] page 93

Lewisham 1969

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

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Table: Table 78Bacteriological Results—Yearly Averages, 1969 of water supplied to the Borough of Lewisham

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Table 78

Bacteriological Results—Yearly Averages, 1969 of water supplied to the Borough of Lewisham

Source of supply	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
	Number of samples	20-24 hours at ire	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 ire.	3 days at 22° C.	Per cent. samples negative in 100ml.	Per cent. samples negative in 100ml.
	River Thames-derived	8,196	66.5	—	39.79	19-0	53.97	70	3,698	12.9	—	99.89	100.0
Deptford	248	0.2	6	98.39	0-1	99.19	—	251	0.3	95	100.0	100.0
Wilmington	238	0.5	46	98.74	—	99.58	—	242	0.1	3	100.0	100.0
Darenth	250	0.1	13	100.0	—	100.0	—	251	0.0	3	100.0	100.0
Bexley	249	0.2	4	99.20	—	100.0	—	253	15.6	97	100.0	100.0
Merton	19	2.3	10	100.0	—	100.0	—	19	0.2	2	100.0	100.0