  When unscreened charged impurities are introduced in charge density wave
system the long wavelength component of the disorder is long ranged and
dominates static correlation functions. We calculate the x-ray intensity and
find that it is identical to the one produced by thermal fluctuations in a
disorder-free smectic-A. We suggest that this effect could be observed in the
blue bronze material K$_{0.3}$MoO$_3$ doped with charged impurities such as
Vanadium.
