[Report of the Medical Officer of Health for Chislehurst] page 35

Chislehurst 1954

[Report of the Medical Officer of Health for Chislehurst]

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Table: A sulphur dioxide gauge will be provided during 1955, thus making available information concerning the more poisonous element of atmospheric pollution.

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A sulphur dioxide gauge will be provided during 1955, thus making available information concerning the more poisonous element of atmospheric pollution.

	Monthly deposit. Tons per sq. mile.
	Jan.	Feb.	Mar.	Apr.	May	June	July	Aug.	Sept.	Oct.	Nov.	Dec.
Water—in rain	1.00	1.82	1.35	0.54	1.65	3.20	2.64	3.03	1.67	1.43	4.20	1.42
pH value	7.0	7.3	7.5	7.0	6.9	6.3	6.4	6.0	6.2	5.9	5.2	6.20
Total water insoluble matter	9.11	6.45	10.45	6.30	10.07	7.48	3.83	5.04	3.20	2.41	3.47	5.87
Soluble in CS₂	0.03	0.08	0.05	0.09	0.08	0.05	0.07	0.14	0.08	0.10	0.10	0.19
Ash	7.25	5.05	8.73	4.92	7.33	5.57	2.51	3.18	2.04	1.81	2.48	4.51
Other combustible matter	1.83	1.32	1.67	1.29	2.66	1.86	1.26	1.72	1.08	0.50	0.89	1.16
Total water soluble matter	8.06	8.34	10.71	6.41	7.55	6.68	4.09	4.36	3.96	2.75	10.60	6.80
Ca	0.89	1.11	2.25	0.91	1.41	0.90	0.34	0.67	0.44	0.23	0.67	0.57
Cl	1.06	1.28	1.17	0.82	0.76	0.74	0.44	0.57	0.52	0.50	2.75	1.96
SO₄	3.46	3.07	4.84	2.21	2.88	2.65	1.42	1.52	1.40	0.97	2.14	1.42
Total solids	17.18	14.79	21.16	12.71	17.62	14.16	7.93	9.40	7.16	5.16	14.08	12.67