Water-Quality Data Analysis of the Upper Gunnison River Watershed, Colorado, 1989–99
Water-Quality Data Analysis of the Upper Gunnison River Watershed, Colorado, 1989–99 By Jason J. Gurdak, Adrienne I. Greve, and Norman E. Spahr U.S. GEOLOGICAL SURVEY Water-Resources Investigations Report 02–4001 NATIONAL WATER-QUALITY ASSESSMENT PROGRAM Prepared in cooperation with the CITY OF GUNNISON COLORADO RIVER WATER CONSERVATION DISTRICT CRESTED BUTTE SOUTH METROPOLITAN DISTRICT GUNNISON COUNTY MOUNT CRESTED BUTTE WATER AND SANITATION DISTRICT NATIONAL PARK SERVICE TOWN OF CRESTED BUTTE UPPER GUNNISON RIVER WATER CONSERVANCY DISTRICT Denver, Colorado 2002 U.S. DEPARTMENT OF THE INTERIOR GALE A. NORTON, Secretary U.S. GEOLOGICAL SURVEY Charles G. Groat, Director The use of firm, trade, and brand names in this report is for identification purposes only and does not constitute endorsement by the U.S. Geological Survey. For additional information write to: Copies of this report can be purchased from: District Chief U.S. Geological Survey U.S. Geological Survey Information Services Box 25046, Mail Stop 415 Box 25286 Denver Federal Center Denver Federal Center Denver, CO 80225–0046 Denver, CO 80225 FOREWORD The U.S. Geological Survey (USGS) is committed Each assessment is guided by a nationally consis- to serve the Nation with accurate and timely scientific tent study design and methods of sampling and analy- information that helps enhance and protect the overall sis. The assessments thereby build local knowledge quality of life, and facilitates effective management about water-quality issues and trends in a particular of water, biological, energy, and mineral resources. stream or aquifer while providing an understanding (http://www.usgs.gov/). Information on the quality of how and why water quality varies regionally and of the Nation’s water resources is of critical interest to nationally.
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