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31
after heavy rain. In all cases the examinations showed that the
raw water was suitable for treatment.
The bacteriological examinations of the treated waters showed
that these waters were of uniformly excellent quality.
(b) Chemical Analyses.
The arrangements for chemical analyses are similar to those
for bacteriological examinations. The total numbers of samples
analysed in the Water Department's laboratory and by the
Consultant were 76 of raw waters and 130 of treated waters going
into supply.
The results of the chemical analyses were uniformly satisfafctory.
The waters are not liable to have plumbo-solvent action.
The whole of the population and dwelling-houses within the
area of supply are supplied from public water mains direct to the
houses.
During 1949 the total number of samples taken by the Public
Health Department was as follows:—
For bacteriological examination 60
For chemical examination 60
All these samples were taken direct from consumers' taps.