Inch/Pound to SI Multiply By To obtain Length inch (in.) 2.54 centimeter (cm) mile (mi) 1.609 kilometer (km) Area acre 4,047 square meter (m 2) square mile (mi 2) 2.590 square kilometer (km 2) Flow rate cubic foot per second (ft 3 /s) 0.02832 cubic meter per second (m 3 /s) inch per year (in/yr) 25.4 millimeter per year (mm/yr) Temperature in degrees Celsius (°C) may be converted to degrees Fahrenheit (°F) as follows: °F=(1.8×°C)+32 Temperature in degrees Fahrenheit (°F) may be converted to degrees Celsius (°C) as follows: °C=(°F-32)/1.8 Horizontal coordinate information is referenced to the North American Datum of 1983 (NAD 83). Specific conductance is given in microsiemens per centimeter at 25 degrees Celsius (µS/cm at 25 °C). Concentrations of chemical constituents in water are given either in milligrams per liter (mg/L) or micrograms per liter (µg/L).

Cover photos. U.S. Geological Survey personnel: 1, operating a motorized boat to a site location. 2, measuring streamflow with ADCP. 3, processing fecal indicator bacteria samples. 4, measuring physical properties at site. 5, collecting streambed sediments. 6, analyzing alkalinity of a surface water-quality sample. 7, collecting a surface water-quality sample using EWI-methods. 8. boat with a sampling crane used to collect surface water-quality samples on large rivers. 9, recording field conditions at site. 10, sampling crane on boat near St. Louis, Missouri. 11, removing sample from D-96 on boat deck. 12, measuring streamflow with StreamPro.

No abstract

The U.S. Geological Survey, in cooperation with the Missouri Department of Natural Resources, designed and operates a series of monitoring stations on streams and springs throughout Missouri known as the Ambient Water-Quality Monitoring Network. During the 2014 water year (October 1, 2013, through September 30, 2014), data were collected at 74 stations-72 Ambient Water-Quality Monitoring Network stations and 2 U.S. Geological Survey National Stream Quality Assessment Network stations. Dissolved oxygen, specific conductance, water temperature, suspended solids, suspended sediment, Escherichia coli bacteria, fecal coliform bacteria, dissolved nitrate plus nitrite as nitrogen, total phosphorus, dissolved and total recoverable lead and zinc, and select pesticide compound summaries are presented for 71 of these stations. The stations primarily have been classified into groups corresponding to the physiography of the State, primary land use, or unique station types. In addition, a summary of hydrologic conditions in the State including peak discharges, monthly mean discharges, and 7-day low flow is presented.

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