[Report of the Medical Officer of Health for Lewisham Borough] page 101

Lewisham 1970

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

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Table: Table 73Bacteriological Results—Yearly Averages, 1970 of water supplied to the Borough of Lewisham

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Table 73

Bacteriological Results—Yearly Averages, 1970 of water supplied to the Borough of Lewisham

Source of supply	BEFORE TREATMENT							AFTER TREATMENT
	Number of samples	Agar plate con per ml.		nt Coliform cou		Escherichia coli nt count		Number of samples	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.	Percent. 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 ml.
River Thames-derived	8,259	31.9	—	37.91	17.3	53 58	4.7	3,710	8.0	—	99.92	99.97
Deptford	247	00	5	98.79	—	100.0	—	250	0.0	19	100.0	100.0
Wilmington	248	0.7	43	98.79	—	100.0	—	253	0.1	20	99.60	100.0
Darenth	244	01	15	100.0	—	100.0	—	250	0.0	1	100.0	100.0
Bexley	269	00	12	99.26	—	100.0	—	253	0.1	46	99.60	100.0
Merton	8	01	3	1000	—	100.0	—	8	0.0	3	100.0	100.0