We use it to cook our food. We use it to bathe ourselves. We use it to quench our thirst. Water is essential to human life, yet many of us take for granted it will be pure and plentiful when we turn on the tap. Starting with the extensive reporting earlier this year appearing in LNP and on LancasterOnline, we begin a yearlong examination of drinking water in Lancaster County. If you have concerns about your water, or have a coverage suggestion, please send email to water@lnpnews.com or call (717) 291-8622. Send letters to P.O. Box 1328, Lancaster, PA 17608-1328.