"This report describes results of a reconnaissance level field investigation of the quality of irrigation drain water and the effects of its use on federally managed wildlife refuges in the Klamath Basin, California and Oregon. The investigation was designed to indicate the magnitude and extent of any water-quality problems that could threaten wildlife and human health. The investigation also was designed to use similar sampling strategies and sampling media as was used in all Department of the Interior reconnaissance studies throughout the Western United States, thus providing a consistency that would allow comparison between studies. Information provided by this investigation will be used by the DOI Task Group on Irrigation Drainage to evaluate the need for more detailed study. Samples of water, bottom sediment, and biological tissues were collected in 1988 at various locations on or near the refuges and analyzed for selected chemical constituents. The results of the chemical analysis were compared to various standards and criteria, baseline data, and toxicological studies. These comparisons are discussed in the context of the geological, hydrological, and biological systems in the study area"--P. 2,3 [8,9].