[Report of the Medical Officer of Health for Lewisham Borough] page 84

Lewisham 1968

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

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Table: Table 73Bacteriological Results—Yearly Averages, 1968 of water supplied to the Borough of Lewisham

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Table 73

Bacteriological Results—Yearly Averages, 1968 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			Agar plate count per. ml.		Coliform count	E. coli count
	Number of samples	20-24 hours at 37 °C	3 days at 22°C.	Percent. 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.	Percent. samples negative in 100 ml.	Percent. samples negative in 100 m/.
All Thames-derived	—	—	—	—	—	—	—	3,651	11.4	—	99.86	99.97
Deptford	219	01	98	9315	0.4	95.43	0.2	223	0.2	98	100.0	100.0
Wilmington	240	1.8	37	89.58	10	94.58	0.1	246	0.4	5	100.0	100.0
Darenth	246	0.1	18	97.15	0.1	97.97	0.1	253	0.0	1	100.0	100.0
Bexley	246	0.1	3	99.59	—	99.59	—	250	0.1	6	100.0	100.0