Water quality monitoring on the Bronx River has been ongoing for the past 20 years, documenting changes in water and air temperature, pH, Dissolved Oxygen (DO), conductivity, and salinity. Citizen Science on the Bronx River: An Analysis of Water Quality Data, 3 is a report prepared for the Bronx River Alliance in 2014 by Fuss and O’Neill. This report reviewed and analyzed available water quality data collected by the Bronx River Alliance, volunteers and partner groups, from the 1990s through 2013. The report summarized over 1,000 water quality samples, identified trends and data gaps, and made recommendations for future monitoring of the river. These recommendations were considered in the design of the subsequent water quality monitoring program.