  Aims: We have observed the 6030 and 6035 MHz transitions of OH in high-mass
star-forming regions to obtain magnetic field estimates in both maser emission
and absorption.
  Methods: Observations were taken with the Effelsberg 100 m telescope.
  Results: Our observations are consistent with previous results, although we
do detect a new 6030 MHz maser feature near -70 km/s in the vicinity of W3(OH).
In absorption we obtain a possible estimate of -1.1 +/- 0.3 mG for the average
line-of-sight component of the magnetic field in the absorbing OH gas in K3-50
and submilligauss upper limits for the line-of-sight field strength in DR 21
and W3.
  Conclusions: These results indicate that the magnetic field strength in the
vicinity of OH masers is higher than that of the surrounding, non-masing
material, which in turn suggests that the density of masing OH regions is
higher than that of their surroundings.
