  A low-energy effective theory is said to be in the swampland if it does not
have any consistent UV completion inside a theory of quantum gravity. The
natural question is if the standard model of particle physics, possibly with
some minimal extensions, are in the swampland or not. We discuss this question
in view of the recent swampland conjectures. We prove a no-go theorem
concerning the modification of the Higgs sector. Moreover, we find that QCD
axion is incompatible with the recent swampland conjectures, unless some
sophisticated possibilities are considered. We discuss the implications of this
result for spontaneous breaking of CP symmetry. We comment on dynamical
supersymmetry breaking as well as the issue of multi-valuedness of the
potential.
