[Report of the Medical Officer of Health for Tottenham] page 26

Tottenham 1955

[Report of the Medical Officer of Health for Tottenham]

This page requires JavaScript

Copy text to clipboard

26
Average Results of the Chemical and Bacteriological Examinations of the Water Supplied
to the Borough of Tottenham for the Year 1955

Download table as:

Description of the Sample	No. of Samples	Ammon-iacal Nitrogen	Albuminoid Nitrogen	Oxidised Nitrogen (Nitrate)	Chlorides as C1	Oxygen abs. from Permanganate 4 hrs. at 27Â°C	Turbidity in Terms of Silica	Colour m. m. brown 2ft. Tube Burgess's Tintometer	Hardness (Total)	Hardness (Non-carbonate)	pH. Value	Phosphate as P.O. 111 4	Silica as SiO₂	Copper as Cu	Sulphate as ^SO4	Conductivity
New River water filtered at Hornsey works	231	0.012	0.064	6. 2	37	0.66	0.2	7	308	79	7.7	0.90	14	-	-	525
New River water filtered at Stoke New-ington works	232	0.0 10	0.070	5.9	37	0.70	0.1	7	305	79	7.7	0.85	13	0.02	57	525
River Thames derived filtered water	1, 663	0.014	0.085	3.8	26	1.04	0.2	12	258	65	7.8	0.50	10	0.03	49	450
Bacteriological Results
Description of Sample				No. of Samples	No. of microbes per ml. Colonies counted on agar after 20-24 hrs. at 37ÂºC.				Bact. coli Test
Description of Sample				No. of Samples					Percentage of samples negative to Bact. coli in 100 ml.				Bact. coli per 100 ml.
New River water filtered at Hornsey				258	9.7				100.0				Nil
New River water filtered at Stoke Newington works				257	18. 4				100. 0				Nil
River Thames derived filtered water				3,561	7.8				99.9				0.002