  Although the Sloan Digital Sky Survey has permitted the discovery of an
increasing number of new ZZ Ceti stars, recent published analyses have shown
that there are still many relatively bright (V < 17) ZZ Ceti stars waiting to
be found. We will discuss the discovery of several such objects in addition to
a number of DA stars in which we detected no photometric variations. These were
uncovered as part of an ongoing spectroscopic survey of DA white dwarfs from
the McCook & Sion Catalog. By determining the atmospheric parameters of a large
sample of DA stars, we were able to identify objects placed within or near the
empirical boundaries of the ZZ Ceti instability strip. By establishing the
photometric status of these stars, we can use them in an effort to conclusively
pin down the empirical boundaries of the ZZ Ceti instability strip.
