The source of your tap water comes from more than just one location. In 2005, the Water Authority provided over 79% of its treated drinking water from its five (5) water wells. These wells are all located within the Villages and produce water from the Evangeline Aquifer. This type of water source is commonly referred to as groundwater. The other source of our drinking water comes from the City of Houston. In August of 1998, the Water Authority began purchasing blended water, a combination of surface water and groundwater, from the City. Surface water comes from rivers, lakes, streams, ponds, reservoirs, and springs. The TCEQ completed an assessment of our source water and the results indicate that some of our sources are susceptible to certain contaminants. The sampling requirements for our water system are based on this susceptibility and previous sample data. Any detections of these contaminants will be found in this report. If we receive or purchase water from another system, their susceptibility is not included in this assessment. For more information please call 713-465-8318.