Gregory Pierce, director of the Human Right to Water Solutions Lab at the UCLA Luskin Center for Innovation, participated in a discussion about the safety of tap water in California organized by KQED, the NPR and PBS member station for Northern California. Pierce, who received his master’s and Ph.D. degrees from UCLA Luskin Urban Planning, spoke about findings in a recent study conducted in cooperation with the University of Texas at Austin that found social factors — such as low population density, high housing vacancy, disability and race — can have a stronger influence than median household income on whether a community’s municipal water supply is more likely to have health-based water-quality violations.