The Churchill county standard. (Fallon, Nev.) 1908-1920, 1912-12-18
.FALLOH'S CITY WATER SUPPLY
Report Submitted By Winfred
B. Mack OF Water Ana
lysis.
Reno. New, Dec. 10. 191

menu, Istf., DeC. ~, Z.
Mr.. L. W. Crehore, City Electrician
and Superintendent of City Water,
Fallon, Nevada,
Dear Sir
| have the honor to submit the
following report of the examination
of the water supply of the City of
Fallon, from specimens of water col
leeted by me November 30th. Speci-
men No. l was taken from the res
eryoir, specimen No. from the pump
and specimen No. from the city
mains. The reason for collecting
specimens from various parts of the
system was to determine what
changes, If any, occur during stor-
age and in contact with the materials
used in the construction of the reser-
voir mains.
meteorological Examination
Specimen No. l showed 80 bateria
per cubic centimeter which develop
ed at incubator temperature, 95
which developed at room tempera-
ture; No. had 80 per &C at incu-
bator temperature, 85 at room tenn
perature: No. had As per &C at
incubator temperature, 100 at room
temperature.
Cultures in glucose bouillon to
test the presence of organisms which
will ferment glucose with the pro-
duetion of gas showed
No. l, small amount of gas in one
tube of six.
No. 2, 3 tubes with gas of six.
No. 3, 2 tubes with gas of six.
Cultures in milk for the presence
of organisms which will coagulate
milk showed:
No. 1, in 36 hours in 8 coagu-
lated, slightly, in sixty hours coagu-
lation firmer, in "a hours all tubes
coagulated.
No. 2, no coagulation in SO hours,
one in so hours, no further coagula-
tion In "a hours.
No. 3, no coagulation in either 36
or so hours, 2 in "a hours slightly
coagulated. milk cultures were
made from each specimen.
There was no indol production in
any of the cultures made.
Chemical Examination.
The results of the chemical ana
lysis are as follows:
Parts per Million.
Free ammonia No. /, 0.032, Nc. 2,
0.050, No. 3, 0.006
Albuminoid ammonia No. 1, 0.110
No. Q, o.106, No. 3, O.064.
Nitrogen as nitrates, No. l, 0.0027
No. 2, 0.0031. No. 3, 0.0035.
Nitrogen as nitrates, No. 1, 5000
No. 2, 5000, No. 3, 5000.
Required oxygen No. 1, 1900, No.
2, 095 No. 3, 1000.
Chlorine, No. 1, 10000, No. 2,
$4,000, No. 3, $4,000.
Summary and Conclusions
The meteorological showing is
very favorable. The numbers of bac-
terra per cubic centimeter are low,
well within what are considered safe
limits. Those which develop at in
cubator temperature are the really
important ones and the showing here
is very favorable. The numbers that
develop at room temperature are less
important from a sanitary stand
point but it is desirable to have these
low in numbers and the above fig
ures are satisfactory.
Bacteria which ferment glucose
with the production of gas are un-
desirable and are usually considered
as evidence of contamination. The
glucose tubes were each inoculated
with one cubic centimeter of water
In No. 1, but one tube in 6, in No. 2
three in six, in No. 3, but two in 6,
an average of one third of the tubes
inoculate show that there are but
very few of this class of organisms
present. This also is a favorable
showing.
Bacteria which will coagulate milk
are undesirable in water. The most
undesirable species are those which
coagulate promptly and firmly. That
in but one tube from one of the spec
linens was there any coagulation in
36 hours and that but slight, that in
so hours there was but one addition
al tube showing coagulation in an
other specimen is further favorable
evidence. The coagulation occur
ring after 60 hours is of less impor-
tance.
The production of indol in cultures
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