  We present a detailed model atmosphere analysis of 14001 DA white dwarfs from
the Montreal White Dwarf Database with ultraviolet photometry from the GALEX
mission. We use the 100 pc sample, where the extinction is negligible, to
demonstrate that there are no major systematic differences between the best-fit
parameters derived from optical only data and the optical + UV photometry.
GALEX FUV and NUV data improve the statistical errors in the model fits,
especially for the hotter white dwarfs with spectral energy distributions that
peak in the UV. Fitting the UV to optical spectral energy distributions also
reveals UV-excess or UV-deficit objects. We use two different methods to
identify outliers in our model fits. Known outliers include objects with
unusual atmospheric compositions, strongly magnetic white dwarfs, and binary
white dwarfs, including double degenerates and white dwarf + main-sequence
systems. We present a list of 89 newly identified outliers based on GALEX UV
data; follow-up observations of these objects will be required to constrain
their nature. Several current and upcoming large scale spectroscopic surveys
are targeting $>10^5$ white dwarfs. In addition, the ULTRASAT mission is
planning an all-sky survey in the NUV band. A combination of the UV data from
GALEX and ULTRASAT and optical data on these large samples of spectroscopically
confirmed DA white dwarfs will provide an excellent opportunity to identify
unusual white dwarfs in the solar neighborhood.
