Hints from the Health Department. Leaflet from the archive of the Society of Medical Officers of Health. Credit: Wellcome Collection, London
[Report of the Medical Officer of Health for Hayes]
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(Microgranmies per cubic metre)
| William Byrd Scnool, Bath Road | Coldhcrbour Lane | Grange Park School, Lansbury Drive | |
|---|---|---|---|
| January | 85 | 144 | 218 |
| February | 81 | 52 | 160 |
| March | 97 | 230 | 275 |
| April | 33 | 85 | 93 |
| May | 32 | 70 | 74 |
| June | 40 | 33 | 62 |
| July | 31 | 51 | 53 |
| August | 20 | 42 | 29 |
| September | 31 | 51 | 49 |
| October | 98 | 149 | 175 |
| November | 116 | 141 | 180 |
| December | 247 | 406 | 403 |
(Microgrammes per cubic metre)
| William byrd School, Bath Road | Coldharbour Lane | Grange Park School. Lansbury Drive | |
|---|---|---|---|
| January | 79 | 77 | |
| February | 63 | 85 | 84 |
| March | 85 | 118 | 107 |
| April | 33 | 33 | 41 |
| May | 28 | 32 | 24 |
| June | 23 | 26 | 23 |
| July | 23 | 26 | 22 |
| August | 23 | 20 | 15 |
| September | 36 | 46 | 42 |
| October | 118 | 132 | 104 |
| November | 118 | 114 | 115 |
| December | 190 | 198 | 112 |