Produced Water Society is conducting its ninth annual Permian Basin Summit this week in Midland. The three-day event that began Monday addresses produced water issues faced by operators, water midstream companies and water services providers. About 400 people are expected to attend to hear speakers that include state Sen. Kevin Sparks (R-Midland), member of Senate water, agriculture and rural affairs committee; John D. Schmitz, chairman, president and CEO, Select Water Solutions; Robert Cain, executive vice president, Texas Pacific Water Resources; and Richard Brantley, senior vice president, University Lands.