[Report of the Medical Officer of Health for Bexley] page 117

Bexley 1970

[Report of the Medical Officer of Health for Bexley]

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METROPOLITAN WATER BOARD — Water Examination Department
BACTERIOLOGICAL RESULTS - YEARLY AVERAGES, 1970
OF THE WATER SUPPLIED TO THE LONDON BOROUGH OF BEXLEY

Table: METROPOLITAN WATER BOARD - Water Examination DepartmentBACTERIOLOGICAL RESULTS - YEARLY AVERAGES, 1970 OF THE WATER SUPPLIED TO THE LONDON BOROUGH OF BEXLEY

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METROPOLITAN WATER BOARD - Water Examination Department

BACTERIOLOGICAL RESULTS - YEARLY AVERAGES, 1970 OF THE WATER SUPPLIED TO THE LONDON BOROUGH OF BEXLEY

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 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	8,259	31.9		37.91	17.3	53.58	4.7	3,710	8.0		99.92	99.97
Bexley	269	0.0	12	99.26	-	100.0	-	253	0.1	46	99.60	100.0
Crayford No.1	151	0.1	52	92.72	0.3	96.69	0.1	254	0.5	10	100.0	100.0
Crayford No.2	148	0.1	131	83.78	4.9	88.51	-	254	0.5	10	100.0	100.0
Crayford No.3	102	0.0	5	97.06	0.1	98.04	-	250	0.0	1	100.0	100.0
Darenth	244	0.1	15	100.0	-	100.0	-	250	0.0	1	100.0	100.0
Eynsford Well	175	0.0	7	99.43	-	100.0	-	252	0.1	8	100.0	100.0
Eynsford Borehole	195	0.0	1	100.0	-	100.0	-	252	0.1	8	100.0	100.0
Horton Kirby No.1	138	0.1	68	97.83	-	100.0	-	253	0.0	5	100.0	100.0
Horton Kirby No.2	193	0.0	15	99.48	-	99.48	-	253	0.0	5	100.0	100.0
Wansunt Borehole	223	0.3	31	99.10	-	100.0	-	237	0.1	89	100.0	100.0
Wansunt Well	203	1.0	50	99.56	-	100.0	-	237	0.1	89	100.0	100.0
Wilmington	248	0.7	43	98.79	-	100.0	-	253	0.1	20	99.60	100.0

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

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Bexley 1970

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Table: METROPOLITAN WATER BOARD - Water Examination DepartmentBACTERIOLOGICAL RESULTS - YEARLY AVERAGES, 1970 OF THE WATER SUPPLIED TO THE LONDON BOROUGH OF BEXLEY