      The methods in this volume are applicable for sampling and analysis of water, waterborne materials and wastes, water-formed deposits and fluvial sediments, surface water hydraulics and hydrologic measurements. This method has 2 analytes associated with it. The Water Quality Portal contains sample results from sites that use this method. Select data: Sites only Sample results only. Sites where this method was used.The applicable range of this test method is from 0. The range may be extended upward by dilution of an appropriate aliquot. Many workers have found that this test method is reliable for nitrite and combined nitrite-nitrate levels to 0. However, the precision and bias data presented in this test method are insufficient to justify application of this test method in the 0.This test method is applicable to surface, saline, waste, and ground waters. 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