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1. (i) Water Supply.
The water to the district is supplied by the Metropolitan
Water Board and is derived from several sources namely,
Wilmington, Darenth, Wansunt, Crayford, Bexley and
Deptford wells, the latter mixed with Thames-derived
filtered water. All the water is chlorinated as it leaves
the works. There have been no important extensions of
trunk mains and there have been no changes in the general
scheme of supply to the Borough during 1957.
Bacteriological analyses are made at least five times
a week from all supplies and in the case of the wells the
water is sampled both before and after chlorination. The
water derived from the River Thames is sampled at each
stage of the purification process and tanks to provide an
adequate period of contact of the chlorine with the water
are in operation at all the well stations and at Walton
works.
All new and repaired mains are chlorinated before being
restored to use and samples of water from them are tested
bacteriologically.
During the year 10 samples of water from piped supplies
were taken and submitted to the Public Health Laboratory
for bacteriological examination and all were found to be
satisfactory.
(ii) Drainage and Sewerage.
Sewers have been constructed on the following estates:—
S.W. Sewers 269 lin. yards. Highbanks Close.
S.W. Sewers 290 lin. yards. Tower Road.
S.W. Sewers 160 lin. yards. Yew Tree Close.
S.W. Sewers 373 lin. yards. Broom Mead.
Foul Sewers 63 lin. yards. Broom Mead.
Foul Sewers 43 lin. yards. Latham Road.
S.W. Sewers 170 lin. yards. Rokesby Close
S.W. Sewers 1,044 lin. yards. East Wickham Hutments.
In addition to the above developing owners have constructed
private sewers on the following estates:—
Highbanks Close. Hurst Road.
Otford Close. Grangewood.
Rokesby Close. Broom Mead.
Tower Road. Kemsing Close.
These sewers are of the back drainage system and have
not as yet been taken over as Public Sewers.
2. Rivers and Streams.
No serious pollution was found in rivers or streams
during the year.
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