The booklet informs citizens on issues related to water conservation, ensuring that private water supply systems produce safe drinking water for your family, protecting the long-term quality of our streams and drinking water sources, and helping you to understand the potential sources of pollution to our water resources. The booklet provides general information explaining certified water testing, chain-of-custody, and drinking water regulations and standards. It provides information related to the health (primary standards) or aesthetic (secondary standards) concerns for each parameter and provides information on water quality parameters that do not specifically have a drinking water limit. This reference is intended as a guide to understand water quality by providing guidance on selecting water quality testing parameters for baseline testing from a citizen's perspective and by serving as a tool to help interpret water quality data. In some cases, this document provides guidance on what actions you may want to consider. The booklet can be accessed at http://www.slideshare.net/interpro63/pennsylvania-private-well-owners-manual or http://www.private-well-owner.org.