Karen Mancl is professor emerita of food, agricultural and biological engineering at The Ohio State University. She is a nationally known expert in onsite wastewater treatment and is past president of the Ohio Onsite Wastewater Association. Her research at Ohio State confirms that year-round onsite irrigation systems are an effective approach to eliminating the discharge of nutrients from septic systems into water bodies.Pumper: What led to your research into the use of onsite irrigation systems in Ohio?
Mancl: The discharge of nutrients polluting lakes has been a problem in Ohio for decades. In the summer of 2014, for example, a large toxic
