Urban storm-water-quality data, Portland, Oregon, and vicinity

Urban storm-water-quality characteristics in the metropolitan area of Portland, Oreg., and Vancouver, Wash., were determined for eight drainage basins with varying drainage areas, basin slopes, impervious areas, and land uses. Automatic water-quality samplers, rain gages, and stream gages were installed in each basin. From September 1, 1975, to June 3, 1977, data were collected to determine rainfall intensities and define discharge hydrographs. Data from almost 650 samples show variation in concentration for about 20 parameters. This report contains data collected between May 1, 1976, and June 3, 1977. Data on the first 500 samples collected before May 1, 1976, are reported by McKenzie and Miller (1976).