The Ontario Argus. (Ontario, Or.) 1???-1947, 1918-01-03

WORKS, suck as tlterS, are completed.
II Is Eowever, as an adjunct to filtera-
tion that sterilization has its chief
value.
The waters of the Snake river may
be quite turbid at times. and to be
rendered potable, safe and attractive.
they must be filtered.
Slow sand filters for many reasons
are not satisfactory for the treatment
Of the water in question, while on the
other rand. rapid sand filters adapt
themselves readily to the widely vary
ing character and conditions Of water
which they are called upon to handle.
From these very beief considera-
tions It is therefore proper to con
clude that rapid sand filtering en-
ploying coagulation and subsidence Of
the waters Of the Snake river using
sterilization II necessary in order to
make assurance doubly sure. repre-
sent the methods best known at this
time for the treatment OF the propos-
ed water supply for Ontar',.
Tie development OF rapid sand fiji
iteration in the United states: The
first municipal rapid sand filtera-
ton plant built was in New Jersey. in
1885. and between that date and 1915
upwards OF 500 municipal filterlng
plants OF this type have been built, or
are now under construction In the
United States
Al this time the daily capacity Of
liberation plants OF the rapid sand
type ia approximately two billion gal
ions. and nearly II million persons.
or 81 per cent Of the urban popula-
ton Of the United States we're resi-
dents OF cities whose water supplies
wore being purified by alteration.
This means that on the average, one
person out OF every 2.5 persons liv-
Ing In communities IN the United
states which are largo enough to be
supplied through public water works,
is provided with filtered water.
On l0ii nearly ~ million people
living lr perhaps 345 cities were sup
piled from various sources purified by
rapid sand alterations. This is tho
general process that n proposed here.
Zoe for the treatment OF the water
supply for Ontario
II ia reasonable and safe 10 osti-I
mate that m 1920 fully 60 per cent
aud by 1880 fully 75 per cent OF the
urban population OF the United States
will be supplied with filtered water.
The development ofthe art OF rapid
sand liberation was very great In the
proiod from 1900 TO 19ii. aud the
results OF its operation as shown In
the lowering OF death rate figures and
general improvements In public heal F..
M where filtered water has been used.
proven its full value and efficiency
beyond any question OF doubt.
II is most interesting 10 note the
number Of large cities IN the United
States which have In rccontyears ad-
opted the methods OF publication in
'olying the use of rapid sand filtera-
ion, In these citios the purifcation
n the water supply hlH heen highly
and successful Results have
been so highly satisfactory that this
node OF treatment of mrhid waters
las become standard and no other
ype of alteration is today consider
ii.
4 study of the water available
or liberation at Ontario shows that
will. after treatment come within
be- rigorous standards OF pure wat
= supply, as laid down by the United .
tatos Public Health Service stand =
rds. and that no unusual engineer
lg or construotional problems will
e encountered In the building OF
liant To obtain such results.
Efficiency OF Proposed Plant: The
liant proposed herein is one that Is
ltended to fulHll all the require
tents OF what modern hygenic stand
rds, az regards water supply de-
land, and IL It can be obtained AZ -
ny way near rational cost, Il would
'em perfection. The question may
'erefore he properly asked; 'wiI
Ms Plant fulfill these require
ents'" The answer is most decid-
lly "Yes."
Recently constructed filter plants
the type proposed by the writer,
ave. when properly designed and op.
'ated, proven highly efficient IN the
'moval of turbldity. bacterial life
nd disease hearing germs In fact,
Is the practice OF filter contractors
specify and guarantee that plants
lilt by them viii show ofacionCles
excess OF ~ per cent. As a matter
the fact, In actual operation, when
'oper care is exercised, eficiencies