Detailed site visits were made to eight U.S. water utilities to assess the capital and O and M costs of meeting the requirements of the Safe Drinking Water Act (SDWA). New treatment facilities were constructed at each of the utilities to correct water quality problems which are current issues under the SDWA. The drinking water problems addressed in the report included coliform bacteria, turbidity, trihalomethanes (THMs), Giardia lamblia, and trichloroethylene (TCE). New treatment facilities constructed included conventional treatment using flocculation, sedimentation, filtration, and chlorination for coliform bacteria, turbidity, and Giardia removal. Preozonation was installed at one utility for reduction of THMs. Airstripping facilities were constructed at three of the utilities primarily for removal of TCE from groundwater. In addition to documenting the costs of meeting the SDWA, the individual reports prepared for each utility contain 10 years worth of data on many water system activities. These include capital and O and M costs for the categories of acquisition, treatment, and distribution of water, and support services.