Descriptions and chemical analyses for selected wells in the Central Sacramento Valley, California

Abstract

The Sacramento Valley occupies the northern one-third of the Great Central Valley of California. The study area of this report includes about 1,200 square miles (3,100 square kilometres) adjacent to the Sacramento River from Knights Landing to Los Molinos, in parts of Yolo, Sutter, Colusa, Glenn, Butte, and Tehama Counties. Between April and August 1975, 559 wells were selectively canvassed, and during September and October 1975, water samples were collected for chemical analysis from 209 of the 559 wells canvassed. Field determinations of alkalinity, conductance, pH, and temperature were made on the site at the time of sampling. The samples were then field prepared for shipmment and analysis for individual constituents at the Geological Survey Central Laboratory, Salt Lake City, Utah. Descriptive data for water wells are listed in table 1, chemical data in tables 2 and 3, and the location of these wells is shown on maps 1-33.