Unfortunately, many domestic well owners do not have the resources to protect their well or regularly test their water quality. As a result, domestic wells are the most common way for people to be exposed to groundwater contaminants. Despite these risks, the majority of domestic wells provide safe and reliable water supplies. Where public water supplies are not available, domestic wells are usually the best water supply option, as long as they are properly constructed, located away from contaminant sources, and regularly maintained and monitore