View report page

58
SECTION D
SANITARY CIRCUMSTANCES OF THE AREA
Water Supply
I am indebted to Dr. E. Windle Taylor, Director of Water Examination,
Metropolitan Water Board for the following report on the water supplied to the
Borough.
The supply to the Borough of Lambeth has been satisfactory both in quantity
and quality during the year 1961.
"There were no new important extensions of trunk mains nor any changes in
the general scheme of supply to your area during 1961 but the length of new
mains laid amounted to 2,737 yards. All new and repaired mains are chlorinated
before being restored to service and samples of water from them are tested
bacteriologically to ensure that its quality is up to that normally supplied."
The number of samples taken during the year from the Thames Valley
Southern Group for chemical examination was 156 and the number taken for
bacteriological examination 1835.
The average results were as follows:-
Chemical Examination Milligrams per litre (unless
Description of sample
otherwise stated)
Thames derived filtered water
Ammonia nitrogen 0.041
Albuminoid nitrogen 0.076
Oxidised nitrogen-nitrate 4.1
Chlorides as C1 27.0
Oxygen abs. from Permanganate
4 hours at 27°C 1.06
Turbidity units 0.2
Colour m.m. brown 2 ft. tube
Burgess's Tintometer 13.0
Hardness (total) 262
Hardness (non- carbonate) 52.0
pH value 7.9
Phosphate as P04 1.0