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(i) Water Supply.
The Borough is supplied with water by the Metropolitan
Water Board, and during the year a good and
constant supply has been maintained.
I am informed by the Clerk of the Board that—
' (a) No new public water supply has been instituted
in this Borough during the past year.
(b) A borehole has been sunk at Bexley, but no
supply has yet been taken from it. A booster station
has been constructed at Erith, but is not yet in actual
use.
(c) No important extensions of trunk mains have
been laid.
(d) No changes in the general scheme of supply to
the Borough of Bexley took place during the year 1938.
(e) Early in May, 1938, it was considered desirable
to instal apparatus for chloramine treatment at one of
the wells at Crayford, which affords part of the supply
to Bexley. This treatment has been continuous since
9th May, 1938. The supply to Bexley has continued to
maintain a high standard of purity.'
Examinations of samples of water from piped supplies
to houses in the district have been made on samples
collected by the Sanitary Inspectors, with the following
results: —
Bacteriological.
No. of organisms per c.c. capable of
growth on Agar at:
B. coli
presumptive
37° 0.
22° C.
*Present in 100 c.c.
Absent in 90 c.c.
Absent in 100 c.c.
0.24
0.74
*A-typical organism.
Chemical (parts per 100,000).
Total
solid
residue.
Chlorine
Ammonia
Free Albuminoid.
Nitrogen
as
Nitrites.
Oxygen
i hr.
at 80°F,
Absorbed
4 hrs. at Nitrites.
80°F.
38.5 2.55 0.0 0.003 0.2 0.08 0.156 Absent
-2.8 -0.0017 -0.0083
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