  The study of the interaction between ionized jets, molecular outflows and
their environments is critical to understanding high-mass star formation,
especially because jets and outflows are thought to be key in the transfer of
angular momentum outwards from accretion disks. We report a low-spectral
resolution VLA survey for hydrogen radio recombination lines, OH, NH$_3$, and
CH$_3$OH lines toward a sample of 58 high-mass star forming regions that
contain numerous ionized jet candidates. The observations are from a survey
designed to detect radio continuum; the novel aspect of this work is to search
for spectral lines in broadband VLA data (we provide the script developed in
this work to facilitate exploration of other datasets). We report detection of
25$\,$GHz CH$_3$OH transitions toward ten sources; five of them also show
NH$_3$ emission. We found that most of the sources detected in CH$_3$OH and
NH$_3$ have been classified as ionized jets or jet candidates and that the
emission lines are coincident with, or very near ($\lesssim 0.1$ pc) these
sources, hence, these molecular lines could be used as probes of the
environment near the launching site of jets/outflows. No radio recombination
lines were detected, but we found that the RMS noise of stacked spectra
decreases following the radiometer equation. Therefore, detecting radio
recombination lines in a sample of brighter free-free continuum sources should
be possible. This work demonstrates the potential of broadband VLA continuum
observations as low-resolution spectral line scans.
