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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(Microgr ammes per cubic metre)
| William Byrd School, Bath Road | Coldharbour Lane | Grange Park School, Lansbury Drive | |
|---|---|---|---|
| January | 189 | 236 | 317 |
| February | 191 | 251 | 321 |
| March | 115 | 176 | 167 |
| April | 81 | 100 | 118 |
| May | 38 | 67 | 59 |
| June | 43 | 52 | 49 |
| July | 56 | 87 | 66 |
| August | 41 | 65 | 50 |
| September | 90 | 119 | 105 |
| October | 96 | 122 | 109 |
| November | 143 | 166 | 175 |
| December | 202 | 210 | 219 |
| January | 165 | 159 | 115 |
| February | 125 | 166 | 100 |
| March | 71 | 97 | 52 |
| April | 51 | 61 | 51 |
| May | 30 | 28 | 16 |
| June | 24 | 24 | 15 |
| July | 30 | 29 | 20 |
| August | 34 | 27 | 20 |
| September | 55 | 53 | 46 |
| October | 56 | 56 | 52 |
| November | 99 | 100 | 74 |
| December | 186 | 145 | 121 |