The Nature Conservancy, in collaboration with the US Environmental Protection Agency and the US Geological Survey, recently launched a Challenge seeking to identify and spur development of technologies to monitor nitrogen concentration in effluent from advanced Onsite Wastewater Treatment Systems. The Challenge has a guaranteed award of $20,000 but up to $55,000 is available for awards. Winners will also have the special opportunity to attend the Sensor Showcase in May 2017. Winning solvers will be able to present their solutions and meet the Seekers and collaborators of this prize competition. We recently spoke with Christopher Clapp from The Nature Conservancy about the Challenge.