[Report of the Medical Officer of Health for Bromley] page 153

Bromley 1969

[Report of the Medical Officer of Health for Bromley]

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Table: BACTERIOLOGICAL RESULTS—YEARLY AVERAGES, 1969 OF WATER SUPPLIED TO THE LONDON BOROUGH OF BROMLEY

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BACTERIOLOGICAL RESULTS—YEARLY AVERAGES, 1969 OF WATER SUPPLIED TO THE LONDON BOROUGH OF BROMLEY

Source of supply	Number of samples	BEFORE TREATMENT						Number of samples	AFTER TREATMENT
		Agar plate count per ml.		Coliform count		Escherichia coli count			Agar plate count per ml.		Coliform count	E. coli count
		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.		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	8,196	66.5	-	39.79	19.0	53.97	7.0	3,698	12.9	—	99.89	100.0
Merton	19	2.3	10	100.0	—	100.0	—	19	0.2	2	100.0	100.0
(a) Eynsford Well	169	0.2	30	99.41	—	100.0	-	252	0.0	9	99.60	99.60
(b) Eynsford Borehole	174	0.1	4	99.43	—	99.43	—	252	0.0	9	99.60	99.60
(a) Horton Kirby No. 1	196	0.2	73	91 .84	0.4	94.90	0.3	249	0.1	8	100.0	100.0
(b) Horton Kirby No. 2	199	0.1	15	94.47	0.2	96.48	0.1	249	0.1	8	100.0	100.0
Jewels Wood	104	0.1	3	99.04	—	100.0	-	105	4.6	11	100.0	100.0
(a) Lullingstone No. 1	166	0.1	2	99.40	—	99.40	-	248	0.1	11	100.0	100.0
(b) Lullingstone No. 2	138	0.1	1	99.28	—	100.0	—	248	0.1	11	100.0	100.0
(a) North Orpington No. 1	191	1.4	13	40.31	5.5	61.8	2.3	251	0.6	53	100.0	100.0
(b) North Orpington No. 2	186	2.8	31	43.01	4.2	62.4	1.6	251	0.6	53	100.0	100.0
Orpington	226	0.1	7	98.23	—	99.56	-	230	0.1	7	100.0	100.0
(a) Shortlands No. 1	177	0.1	31	98.31	—	99.44	-	250	0.2	3	100.0	100.0
(b) Shortlands No. 2	171	0.1	5	100.0	—	100.0	-
(c) Shortlands No. 3	139	0.3	51	100.0	—	100.0	—
(a) Sundridge No. 1	108	0.0	1	99.07	—	99.07	-	252	0.2	185	100.0	100.0
(b) Sundridge No. 2	138	0.1	8	99.28	—	100.0	-
(c) Sundridge No. 3	179	0.1	17	100.0	—	100.0	-
(d) Sundridge No. 4	171	0.2	7	99.42	—	100.0	—J
West Wickham	123	0.8	67	97.56	0.1	100.0	-	118	0.1	24	100.0	100.0