Page 49 - 1915, Springs of CA.

HOT SPRINGS. 47

AGUA TIBIA SPRINGS (SAN DIEGO 2).
Near the southern base of Agua Tibia Mountain and 25 miles in a
direct line north of west from Warner Hot Springs, warm water
(agua tibia), issues along a fault zone that is parallel to the one in
Warner Valley. The water rises with a temperature of 92 °, in a
marshy area that covers perhaps an acre. It is conducted from a
board-curbed pool to tubs in a near-by house, for bathing and laundry
use. Bubbles continually rise in the pool and the water is distinctly
sulphureted.
Analysis of water from main spring, Agua Tibia Springs, San Diego County, Cal.

[Analyst, M. E. Jaffa. Authority, owner of spring. Constituents are in parts per million,
by weight.]
Temperature......................................... 33° 0.(92° F.)
Properties of reaction:
Primary salinity...................................... Dominant.
Secondary salinity.................................... 0
Tertiary salinity...................................... 0
Primary alkalinity................................... Moderate.
Secondary alkalinity................................... Small.
Tertiary alkalinity................................... Present.
Residue:
Soluble in water............................................. 326
Insoluble in water........................................... 51
Combined water and organic matter..................... .... 33
410

Portion soluble in water:
Sulphate (SO4). ............................................ 100
Chloride (Cl)................................................ 70
Carbonate (CO3)............................................. 36
Chiefly sodium (Na) and potassium (K)..................... 120
Portion insoluble in water:
Silica (SiO2)............................................... 21
Calcium (Ca), magnesium (Mg), sulphate (SO4), and carbonate
(CO3), chiefly calcium. ................................... 30
This water is essentially primary saline in character, being a soft
water of moderate mineralization.

DELUZ WARM SPRINGS (SAN DIEGO 1).
In the bed of Deluz Creek, near the northwestern boundary of
San Diego County, warm water rises, which is slightly sulphureted
and ferruginous. The thermal character of the springs has been
assigned to the presence of a dike of dark, aphanitic diorite, about
6 feet thick, that cuts through the granitic country rock and crosses