At Street Level is an applied ethnographic film that tells the story of how a small environmental justice NGO in West Oakland, California - the West Oakland Environmental Indicators Project (WOEIP) - uses science to help convince policymakers, city regulators and politicians that environmental changes are needed in their community in order to increase the local air quality. Situated adjacent to the Port of Oakland, the fifth busiest container port in the United States, the city of West Oakland is severely impacted by pollution. The fuel used by ships, trucks and trains that transport goods to and from the port generate diesel particulate matter that has deleterious health effects on community members. This includes increased incidence rates of asthma and cancer. To show policymakers that West Oakland's microenvironment has a significantly higher level of diesel pollution than the general macroclimate in Oakland, Co-Directors of WOEIP Margaret Gordon and Brian Beveridge initiated the "Personal Air Monitoring Project" in coordination with Intel Corporation. The purpose of the project is to have students and out-of-work community members volunteer to walk around the neighborhood with an industrial air-monitoring device that collects data about the local air quality. Data collected every day is then uploaded to a server that uses software to map the air quality at specific locations on the 'survey route.' The Personal Air Monitoring Project has brought WOEIP national attention - Congresswoman Barbara Lee and U.S. Environmental Protection Agency Administrator Lisa Jackson visited WOEIP for a presentation on preliminary results of their research.