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Water-quality, hydrological, and ecological data collected from June 2005 through September 2013 from the Little Blue River and smaller streams within the City of Independence, Missouri, are presented in this report. These data were collected as a part of an ongoing cooperative study between the U.S. Geological Survey and the City of Independence Water Pollution Control Department to characterize the water quality and ecological condition of Independence streams. The quantities, sources of selected constituents, and processes affecting water quality and aquatic life were evaluated to determine the resulting ecological condition of streams within Independence. Data collected for this study fulfill the municipal separate sewer system permit requirements for the City of Independence and can be used to provide a baseline with which city managers can determine the effectiveness of current (2014) and future best management practices within Independence. Continuous streamflow and water-quality data, collected during base flow and stormflow, included physical and chemical properties, inorganic constituents, common organic microconstituents, pesticides in streambed sediment and surface water, fecal indicator bacteria and microbial source tracking data, and suspended sediment. Dissolved oxygen, pH, specific conductance, water temperature, and turbidity data were measured continuously at seven sites within Independence. Base-flow and stormflow samples were collected at eight gaged and two ungaged sites. Fecal sources samples were collected for reference for microbial source tracking, and sewage influent samples were collected as additional source samples. Dry-weather screening was done on 11 basins within Independence to identify potential contaminant sources to the streams. Benthic macroinvertebrate community surveys and habitat assessments were done on 10 stream sites and 2 comparison sites outside the city. Sampling and laboratory procedures and quality-assurance and quality-control methods used in data collection for this study are described in this report. Introduction The U.S. Geological Survey (USGS) and the City of Independence, Missouri, Water Pollution Control (WPC) Department began a cooperative study in June 2005 to characterize and evaluate the water quality and ecological condition of streams within Independence. The quantities and sources of pollutants were determined to better understand the processes that affect water quality and its effect on aquatic life in Independence streams. Hydrological, water-quality, and ecological data were collected between June 2005 and September 2013 and compiled and summarized for this report. The data collected will assist Independence in fulfilling its National Pollution Discharge Elimination System (NPDES) permit requirements for the municipal separate storm sewer system (MS4). According to the Electronic Code of Federal Regulations (2013), an MS4 is a system of conveyances that include man-made channels, pipes, tunnels, and storm drains, as well as surface streets, catch basins, curbs, gutters, and ditches that discharge into waters of the United States. In order for Independence to meet the conditions for its MS4 permit and to design effective strategies to reduce contaminant discharges to streams, information about the source and nature of contaminants detected in receiving streams is needed. The data presented in this report can be used by Independence to evaluate differences between base-flow and stormflow water quality in its urban streams, implement its stormwater management program (SWMP), evaluate best management practices (BMPs), and establish a baseline by which the effectiveness of current (2014) and future BMPs can be measured.

Hydrological, water-quality, and ecological data for streams in Independence, Missouri, June 2005 through September 2013