Water Testing (IMAGE) American Society of Agronomy Caption Private water wells are a vital source of drinking water in Pennsylvania. They provide water to nearly one million rural homes and farms. Credit Chad Voorhees Usage Restrictions Use with story only. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.