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82
Since the Langham Laboratory has been in use
samples of the water supplied from the Langham
Works are examined daily and further samples from
the river sedimentation reservoir and primary filters
are also examined. About eighteen samples of water
from the Company's wells are examined weekly."
In addition to the afore-mentioned examinations,
10 samples were submitted to the Public Health Laboratories
for chemical and bacteriological examination and
with one exception were found satisfactory. The
unsatisfactory sample was drawn from the supplies to
a tap, fed from a storage tank, placed in the roof of the
house, and which had been left uncovered.
In order to avoid unnecessary sampling in the area of
the South Essex Waterworks Company's supply, a
meeting of the Medical Officers of Health in such area
was convened, where it was decided that future sampling
should be carried out in accordance with an approved
rota. This method of sampling is now in force.
Supplies from local wells.—There are eight wells in
the district.
During the year the Mineral Water Company operating
in the district discontinued to draw their supplies
for mineral waters from their own well and replaced it
by the main supply. The Company does, however,
continue to use water from their deeper well for the
purpose of bottle washing.
At two factories the drinking water is drawn from
deep wells. Samples from both have been obtained and
are satisfactory. In one case an application was made
for a certificate of approval in accordance with Section
41 of the Factories Act, 1937. The remaining wells
are used for industrial purposes only.