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bacteriological samples all of which were found to be free from type
1 B. Coli and eleven chemical samples which were satisfactory. In
addition, 17 bacteriological samples and 9 chemical samples were
submitted for independent analysis in this period and were all reported
to be of a satisfactory quality.
Between April 1st and December 31st the Lee Valley Water Company
took 410 bacteriological samples all of which were free of type 1
B. Coli in 100 ml. quantities and 15 chemical samples which were
satisfactory, being a total of 425 samples.
Eleven samples were also taken by the Public Health Department
and submitted to the laboratory at Coppetts Wood Hospital. All of
these samples were reported as satisfactory.
OTHER INSPECTIONS
PET SHOPS
Three persons are licensed to keep pet shops in the district and
visits are made periodically to the premises. In each case the business
has been found to be carried on satisfactorily.
INFESTATIONS
RODENT CONTROL
During the year 465 complaints of rats and mice were received. All
complaints were visited and in addition premises adjoining the houses
from which the original complaints were received were also visited as
necessary. In consequence 650 properties were inspected for rats and
mice infestations during the year. Of these properties 458 were found
to be infested and were treated for infestation.
The number of complaints received were almost exactly the same
as in 1959. The increase in visits was due to it being necessary to
include more of the surrounding properties in the primary inspections
in order to locate the source of the infestation.
In the 1959 Report it was stated that rat and mice complaints
showed an increase of about 50 per cent over 1958. It is apparent
from the figures for this year that these numbers have been upheld. All
the infestations which were visited were of a minor character although
some of these are very persistent and recur every year. Where difficulty
is experienced re-treatment using various poisons and bait produce
satisfactory results.
The 10 per cent test baiting of the sewer manholes was carried out
during June. Eight manholes showed "takes" and these were subsequently
treated with Warfarin and with Paranitrophenol as a mould
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