Recent high resolution laser spectroscopy, applied to the vibration-rotation spectrum of water vapor, indicates that half-widths involving high values of the rotational quantum numbers are in disagreement with corresponding half-widths determined theoretically. The present calculation compares atsmospheric transmission results and outgoing intensity obtained from theoretically determined values with those obtained using the recently available laser spectroscopy data. For a zenith angle of zero degrees, the atmospheric transmission and outgoing intensity are found to be 8.35% and 10.25 ergs cm−2 sec−1 ster−1, respectively, for the theoretically determined values, while the laser spectroscopy values increase the transmission and outgoing intensity to 10.0% and 10.74 ergs cm2 sec−1 ster−1. The preseent calculations are restricted to a narrow spectral region extending from 1 877.15 cm−1 to 1 880.00 cm−1 in the neighborhood of the experimental spectroscopy measurements.