[Report 1910] / Medical Officer of Health, Tynemouth County Borough.

  • Tynemouth (England). County Borough Council.
Date:
1910
Catalogue details

Licence: Attribution 4.0 International (CC BY 4.0)

Credit: [Report 1910] / Medical Officer of Health, Tynemouth County Borough. Source: Wellcome Collection.

    34/98 (page 36)
    The raw waters were also tested for plumbo-solvency, and were found to give the following average results, stated as parts per 100,000 : — Fallowlees, *21. Newbiggen, *22. In order to compare these results with the water as distributed to the town, after filtration through sand by gravitation, an analysis of the tap water made on the 16th March, 1910, gave the following results :— Chlorides as Chlorine Parts per 100,000. 0*900 Nitrites as Nitrogen Nil Nitrates as Nitrogen 0-014 Free Ammonia 0-002 Albuminoid Ammonia o-oio Oxygen Absorbed (4 hours at 37° C.) 0-340 Total Hardness 7-5° Total Solids... 12-0 The intensity of colour by Hazen’s standard was 12°. and the reaction to lacmoid neutral. The sample was also examined for alkalinity by titrating 100 c.c. with decinormal H2 S04, using methyl orange as an indicator, and required 1*3 c.c. for neutralisation. It was further tested for plumbo-solvency and was found to be non¬ solvent, und therefore safe in this respect for distribution. It now remained to ascertain the source of alkalinity of the filtered water, as the main feeders were distinctly acid and plumbo-solvent. The other sources of supply to the reservoir were next examined, namelv the small spring and the two burns, which supplement the supply from the Fallowlees and Newbiggen streams. The spring is evidently derived from the chalk beds, as the water left a white deposit on each side of the track as it flowed along. The amount of water discharged from the spring was very small but was clear and sparkling. The alkalinity alone was determined, and 100 c.c. of the spring water required 4*4 c.c, of decinormal H? SO, fcr neutralisation,