Drinking water quality is a vital public health concern to consumers a
nd regulators alike. This article describes some of the current microb
iological, chemical, and radiological concerns about drinking water an
d the evolution of water vending machines. Also addressed are the typi
cal treatment processes used in water vending machines and their effec
tiveness, as well as a brief examination of a certification program sp
onsored by the National Automatic Merchandising Association (NAMA), wh
ich provides a uniform standard for the design and construction of foo
d and beverage vending machines. For some consumers, the water dispens
ed from vending machines is an attractive alternative to residential t
ap water which may be objectionable for aesthetic or other reasons.