Nutrients and Major-Ions Measured in Water-Quality Samples Collected from Four North Texas Reservoirs (ver. 3.0, September 2021)

In cooperation with Dallas Water Utilities (DWU), the U.S. Geological Survey (USGS) measures nutrient and major-ion concentrations in selected reservoirs in north...美国地质调查局（U.S. Geological Survey, USGS）与达拉斯水务公司（Dallas Water Utilities, DWU）合作，对北部地区选定水库中的营养盐及主要离子浓度进行测定。