[Report of the Medical Officer of Health for Bromley] page 85

Bromley 1972

[Report of the Medical Officer of Health for Bromley]

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BACTERIOLOGICAL RESULTS—YEARLY AVERAGES, 197? . FOR WATER SUPPLIED TO THE LOUDON BOROUGH OP BROMLEY

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 lf>0 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	8 087	42.3	—	41.94	10.2	56.76	4.0	3 891	10.0		99.85	99.97
Eynsford Well	182	0.0	10	100.0	-	100.0	-
Evnsford Borehole	214	0.1	3	100.0	—	100.0	-	244	0.2	14	100.0	100.0
Horton Kirby No.l	115	0.0	62	87.83	0.3		0.1
Horton Kirby No.2	163	0.0	2	98.77	-	99.39	-	248	0.1	11	100.0	100.0
Lulling stone No.l	107	0.1	67	99.1	-	99.1	-
Lullingstcne No.2	182	0.1	3	100.0	-	100.0	-	251	0.1	31	100.0	100.0
Merton Abbey	1	-	-	100.0	-	100.0	-	1	5.7	-	100.0	100.0
North Orpington No.l	198	3.7	36	18.69	13.7	38.89	3.0	253	0.6	60	99.60	99.60
North Orpington No.2	189	1.0	89	22.75	10.5	49.21	2.2
Orpington	248	0.1	87	98.79	-	100.0	-	252	0.0	5	100.0	100.0
Shortlands No.l	160	0.0	10	98.75	0.1	99.38	-
Shortlands No.2	150	0.0	11	100.0	-	100.0	-	253	0.1	3	100.0	100.0
Shortlands No.3	213	0.1	22	100.0	-	100.0	-	-
Sundridge No.l	139	0.0	13	100.0	-	100.0	-
Sundridge No.2	153	0.1	6	100.0	-	100.0	-
	193	0.1	63	100.0	_	100.0	-	249	0.3	55	100.0	100.0
Sundridge No.4	184	0.1	29	100.0	-	100.0	-
West Wickham	182	0.1	172	97.80	-	100.0	-	181	0.2	108	100.0	100.0