The Housing Assistance Supply Experiment surveyed all neighborhoods in Brown County, Wisconsin, during the first quarter of 1974. Two instruments were used. The neighborhood local sources survey collected facts about land use, road characteristics, and pollution for the 108 neighborhoods that compose Brown County. The neighborhood street observation component gathered information about 8,000 blockfaces: presence of various types of land use and condition of residential properties. The audit determined that these surveys in general yielded data of good quality.