[Report 1929] / Medical Officer of Health, Darlington County Borough.
- Darlington (England). County Borough Council.
- Date:
- 1929
Licence: Attribution 4.0 International (CC BY 4.0)
Credit: [Report 1929] / Medical Officer of Health, Darlington County Borough. Source: Wellcome Collection.
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![Clilorine is injected under pressure into the filtered water { main as it leaves the Waterworks. The amount of chlorine 1 added varies from to | ])art ])er million, according to baeterio- } logical findings. Two million gallons per day are used by the 1 16,000 houses in the Borough and the 400 outside. ft Analyses of the river, filtered and chlorinated water arc made weekly by the Borough Analyst, whose rej)orts during the past year have been consistently satisfactory. Typical analyses arc as follows :— River Water. 'Number of colonies on Nutrient Gelatin at 18^-20'^ C. after 72 hours. 600 per e.c. Presumptive B. C’oli Test after 72 hours Positive in 0.1 e.e. ^Filtered Water. I*Number of colonics on Nutrient Gelatin at 18-20'’ C. after 72 hours. 120 ])er e.e. Presumptive B. C’oli Test after 72 hours l^ositive in 0.1 e.e. ^Chlorinated Filtered Water. 'Number of colonies on Nutrient fielatin at 18*’-20'’ C. after 72 hours per 2 e.e. ! Presumptive B C'oli Test after 72 hours Negative in 100 e.e Rivers and Streams.—The River Skerne which (lows through the town and was once regarded as an open sewer, is now provided with well built banks along iTiost of its course. At times during very wet seasons, storm water nuiy overilow into low lying waste land, in the vicinity of Valley Street, at present used as a tij), and by its retention there, with deeom[)osing vegetable matter, there is risk of a serious nuisance. Attention to the weir on the river and the draining of the low lying land would improve the present eye sore immensely, for prohtable development. There was no necessity to take any action to cheek the })ollu- tioh of rivers or streams in the area.](https://iiif.wellcomecollection.org/image/b29149113_0053.jp2/full/800%2C/0/default.jpg)
