[Report of the Medical Officer of Health for Hillingdon] page 66

Hillingdon 1965

[Report of the Medical Officer of Health for Hillingdon]

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Monthly Averages for Smoke and Sulphur Dioxide 1965

MICROGRAMMES PER CUBIC METRE

	76 High Street Northwood		West Mead South Ruislip		* William Byrd School Harlington		Coldharbour Lane Hayes		* Grange Park School Hayes
	Smoke	SO₂	Smoke	so₂	Smoke	so₂	Smoke	so₂	Smoke	SO₂
January	92	80	85	161	79	139	97	166	71	192
February	117	150	98	187	78	167	97	176	68	213
March	59	154	59	213	63	180	83	205	47	214
April	23	61	25	78	44	115	36	127	36	122
May	19	49	19	73	15	63	27	69	17	64
June	16	43	20	56	20	58	26	54	20	54
July	14	34	15	49	11	41	16	52	10	39
August	21	44	25	74	20	62	26	73	22	66
September	32	50	41	92	32	71	43	95	25	76
October	68	113	83	177	75	192	96	204	66	224
November	77	118	92	133	72	129	91	129	58	131
December	100	97	89	102	51	79	65	85	44	71

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*Situated in a Smoke Control Area.
The stations at which these readings were taken are shown on the Smoke Control Programme Map
and are marked S.

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MICROGRAMMES PER CUBIC METRE

	Summer Monthly Average		Winter Monthly Average		Increase Between Summer & Winter		Ratio Summer & Winter
	Smoke	so₂	Smoke	SO₂	Smoke	so₂	Smoke	SO₂
76 High St. Northwood	20.8	46.8	85.5	118.7	64.7	71.9	1:4.1	1:2.5
West Mead S. Ruislip	24.2	70.5	84.3	162.2	60.1	91.7	1:3.8	1:2.3
Wm. Byrd Harlington	23.7	68.3	69.7	147.7	46.0	79.4	1:3.0	1:2.2
Coldharbour Lane, Hayes	29.0	78.5	88.2	160.8	59.2	82.3	1:3.0	1:2.0
Grange Park, Hayes	21.7	70.2	59.0	176.2	48.5	106.0	1:2.7	1:2.5