The Twin Cities Household Ecosystem Project aims to create a seamless model of urban biogeochemistry by studying the flows of carbon, nitrogen, and phosphorus through households. The project conducted a survey of over 3,000 households in the Twin Cities area to understand household consumption patterns and environmental behaviors. Analysis of the survey data along with measurements of household landscapes will allow researchers to quantify nutrient fluxes and identify key drivers of resource use and pollution to inform environmental policies.