[Report of the Medical Officer of Health for St. Marylebone, Metropolitan Borough] page 35

Marylebone 1959

[Report of the Medical Officer of Health for St. Marylebone, Metropolitan Borough]

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TABLE 13.—Bacteriological Examination of Water supplied to St. Marylebone—

Average Results.

Source of supply	Number of samples	After Treatment
		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.	Per cent. samples negative in 100 ml.
Barn Elms	516	5.3	—	99.03	100.0
Ashford Common	257	18.0	—	100.0	100.0
Kempton Park	515	15.5	—	99.8	100.0
Hampton	976	6.7	—	100.0	100.0

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TABLE 14.—Rodent Control.

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TABLE 15.—Air Pollution.

Readings from Deposit Gauges and Other Apparatus for Measuring

Air Pollution

Site	Jan.	Feb.	Mar.	Apr.	May	June	July	Aug.	Sept.	Oct.	Nov.	Dec.
' ' ... Insoluble Matter—Tons per sq. mile (collected in deposit gauges)
N.L.	15.43	5.94	18.17	13.76	6.51	14.51	7.97	9.12	4.17	12.38	15.28	21.58
T.H.	17.78	23.64	24.88	12.89	6.65	5.65	6.91	8.15	1.96	16.12	9.77	9.84
Soluble Matter—Tons -ber sa. mile (collected in deposit gauees).
N.L.	8.87	3.94	7.23	6.85	4.16	5.09	3.89	3.85	1.78	7.42	9.77	9.13
T.H.	10.43	3.08	10.83	7.32	5.75	6.87	5.36	7.71	2.29	11.36	10.05	12.29
Sulphur Trioxide—Milligrams -ber day collected (tier 100 sq. cm. of lead peroxide)
N.L.	5.27	4 36	2.38	1.98	0.99	0.92	0.85	0.92	0.90	2.12	3.82	4.12
T.H.	8.24	7.66	5.06	3.80	2.60	2.40	1.81	2.32	2.80	4.68	7.00	5.54
E.R.	7.38	6.56	4.19	3.37	2.40	1.58	1.47	1.98	2.96	4.37	5.27	3.93
Smoke—Milligrams -ber 100 cubic metres of air average per day (Volumetric method)
T.H.	47	29	21	14	11	9	6	T	5	16	39	24
G.P.	53	36	29	17	—	7	5	T*	7	12	44	28
Sulphur Dioxide—Parts per 100 million parts of air average per day ( Volumetric method)
T.H.	24	24	13	12	7	6	4	5	4	11	18	12
G.P.	21	21	21	9	-	5	5	4	5	7	15	10

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* T Less than 0.05 milligrams of smoke per 100 cubic metres of air.