[Report 1969] / Medical Officer of Health, Darlington R.D.C.
- Darlington (England). Rural District Council.
- Date:
- 1969
Licence: Attribution 4.0 International (CC BY 4.0)
Credit: [Report 1969] / Medical Officer of Health, Darlington R.D.C. Source: Wellcome Collection.
56/64 page 54
![GRAPHS SHOWING PRESENT TRENDS IN ATMOSPHERIC POLLUTION VOLUMETRIC SMOKE FILTER (Smoke Concentration in Microgrammes per Cubic Metre) The average concentration of smoke during the year was 62 microgrammes per cubic metre, (117 in 1968), which for once compares favourabiy with the concentration at Darlington County Borough of 75 microgrammes, (97 in 1968), during the same period. The concentration of smoke at the control site at Sadberge was 27 microgrammes, (25 in 1968), LEAD PEROXIDE INSTRUMENT - ESTIMATES OF SULPHUR DIOXIDE (Milligrams of SO3 per 100 Square Centimetres per Day] The average of sulphur dioxide at Newton Aycliffe of 1.12 milligrams of SO3 per 100 square centimetres per day, (1.18 in 1968), is also lower than was recorded in the heavy industrial area of Albert Hill, Darlington, where readings averaged 1.35, (0.75 In 1968). DEPOSIT GAUGE— Because of repeated vandalism throughout the years the deposit gauge has bean in operation, the site was closed down during the year. Permission is at present being sought for the rasiting of the deposit gauge on the Fire Station roof, which should be free from interference.](https://iiif.wellcomecollection.org/image/b29149903_0056.jp2/full/800%2C/0/default.jpg)
