We recently finished our first phase of field sampling for agricultural waste and wastewater emissions in California and the Mid-Atlantic, in collaboration with Prof. Francesca Hopkins’ group at UC-Riverside. The two groups deployed novel mobile laboratory platforms for comprehensive sampling of greenhouse gases, carbon and nitrogen species, and air pollutants from numerous individual emission sources within these sectors. This is the first of four phases over the next two years to examine diurnal, site-to-site, seasonal, and management practice differences in overall emissions.