We report on the determination of a high quality ab initio potential energy surface (PES) and dipole moment function for water. This PES is empirically adjusted to improve the agreement between the computed line positions and those from the HITRAN 92 data base with J less than or equal to 5 for (H2O)-O-16. The changes in the PES are small, nonetheless including an estimate of core (oxygen 1s) electron correlation greatly improves the agreement with the experiment. Using this adjusted PES, we can match 30 092 of the 30 117 transitions in the HITRAN 96 data base for (H2O)-O-16 with theoretical lines. The 10, 25, 50, 75, and 90 percentiles of the difference between the calculated and tabulated line positions are -0.11, -0.04, -0.01, 0.02, and 0.07 cm(-1). Nonadiabatic effects are not explicitly included. About 3% of the tabulated line positions appear to be incorrect. Similar agreement using this adjusted PES is obtained for the O-17 and O-18 isotopes. For (HDO)-O-16, the agreement is not as good, with a root-mean-square error of 0.25 cm(-1) for lines with J less than or equal to 5. This error is reduced to 0.02 cm(-1) by including a small asymmetric correction to the PES, which is parameterized by simultaneously fitting to (HDO)-O-16 and (D2O)-O-16 data. Scaling this correction by mass factors yields good results for T2O and HTO. The intensities summed over vibrational bands are usually in good agreement between the calculations and the tabulated results, but individual line strengths can differ greatly. A high-temperature list consisting of 307 721 352 lines is generated for (H2O)-O-16 using our PES and dipole moment function.