The pH scale is used to measure whether a substance is acidic
or basic. Pure water has a pH of 7, which is considered
neutral. Substances having a pH of 1 (such as battery acid)
are extremely acidic, while substances having a pH of 13 (such
as lye) are extremely basic or alkaline.
FYI: The pH scale is logarithmic. That means a liquid with a pH
= 3 is ten times as acidic as a liquid with a pH = 4.
pH of some common liquids:
Wine & Beer
do College of Pharmacy faculty have to say about
the counter" water?
Are there health concerns related to pH?
Drinking water (from the tap or bought at the store) is typically
near the neutral pH value. Tucson's water is slightly alkaline
averaging between 7.5 and 8.2.
Exposure to extreme pH values (above 10 or below 4) can lead to
health effects including irritation of the eyes, skin, and mucous
membranes. In addition, high pH has been associated with swollen
hair fibers and exacerbation of skin disorders.
is important for water treatment processes, including disinfection
with chlorine. The pH must be controlled to prevent the corrosion
of water mains and pipes in household systems, which can
lead to a poor taste, odor, and appearance.
Environmental Health Sciences Center
University of Arizona College of Pharmacy, Room 244
PO Box 210207, Tucson, AZ, USA 85721-0207 email@example.com