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58
these powers exist and are operating in the Thames and Lea to
an extent which contributes in no small degree to the safety of
the London water consumer." Yet the Commission evidently
does not look upon these natural processes as in themselves
sufficient to render the water fit for domestic purposes, but is
only satisfied that agencies and the operations of the water
companies combined, suffice to ensure that wholesome water is
supplied to the consumer.
As it is probable that the completeness of the future operations
of the water companies may depend upon the necessity
which can be shown for efficient filtration, it is a matter of great
importance that the natural processes of purification should not
be held to be more deserving of confidence than they really are.
After a careful study of the statements in the Commission's
report, Mr. Murphy is led to think that some of the reasons
given for assuming that the London population is not exposed
to risk are less deserving of acceptance than appears at first
sight.
The very full information afforded in the report of the
Royal Commission is of the utmost possible value as assisting
to give definite form to a general comprehension of the real
condition of the water supply of the Metropolis, present and
future. It has always been a cherished article of faith in this
country that the water of the River Thames is of unsurpassable
quality for all domestic purposes. Nothing can be found in the
report which in any way disturbs this conviction, and it may be
assumed, as has always been urged in these reports, that the
water supplied to London, if properly treated by the avoidance of
pollution, ample storage (in order to avoid the necessity of taking
in water from the river when in flood, as the organic pollution is
then at the maximum), and efficient filtration, is all that can be
desired. The second point as to how long the quantity will
suffice for the needs of ever-growing London is also fully gone
into, and half-a-century is defined as the probable period. Of