Globally, urban land occupy only 2 to 4% of earth’s surface, yet 41% of watersheds are rapidly urbanizing as human population continue to grow. It is estimated that 1 billion people are added on the planet every 13-14 years. This has implications for affecting water quality in these urbanizing watersheds that have a diverse mix of land uses such as agricultural and forests along with wastewater inputs from wastewater treatment plants and septic systems. We invite presentations on the fate and transport of nitrogen, phosphorus, pathogens, and various organic contaminants (such as pesticides, pharmaceuticals and personal care products, hormones, perflorualkyl substances) in urbanizing watersheds.