[Report of the Medical Officer of Health for Orpington] page 26

Orpington 1964

[Report of the Medical Officer of Health for Orpington]

This page requires JavaScript

Copy text to clipboard

26.
METROPOLITAN WATER BOARD
Water Examination Department

Download table as:

BACTERIOLOGICAL RESULTS YEARLY AVERAGES 1964.

of the waters supplied to the Orpington Urban District Council.

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 37⁰C.	3 days at 22°C.	Per cent samples negative in 100ml.	Count per 100ml„	' Per cent samples negative in 100ml.	Count per 100ml.	Number of samples	20-24 hours at 37°C.	3 days at 22°Co	Per cent samples negative in 100ml.	Per cent samples negative in 100ml.
Sundridge No.l well	58	0.0	2	100.0	-	100.0	-	252	0.1	2	100.0	100.0
Sundridge No.2 well	113	0.1	1	100.0	-	100.0	-
Sundridge No.3 well	89	0.0	6	100.0	-	100.0	-	253	0.0	4	100.0	100.0
Sundridge No.4 well	86	0.5	6	100.0	-	100.0	-
Lullingstone No.l well	143	2.3	13	100.0	-	100.0	-	254	0.0	3	100.0	100.0
lullingstone No.2 well	116	0.5	22	100.0		100.0	-
Eynsford No.l well	202	0.5	23	68.81	1.7	99.50	-	251	0.5	14	98.80	100.0
Eynsford No.2 well	1209	0.1	2	95.04	-	100.0	-
Norton Kirby No.l well	172	0.1	14	95.35	0.1	98.26	-	248	0.1	1	100.0	100.0
Norton Kirby No.2 well	213	1.4	6	99.06	-	99.06	-
Orpington Well	240	0.4	6	99.58	-	100.0	-	245	0.2	19	100.0	100.0
North Orpington No.l well	163	2.2	17	11.04	22.5	30.06	6.8	253	0.8	8	99.60	99.60
North Orpington No.2 well	169	1.4	18	15.38	17.2	33.73	5.7	253	0.8	8	99.60	99.60