Survey of rural, private wells. Statistical design

By:  and 
Edited by: Lennon Gerard P.Rouhani Shahrokh


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Half of Illinois' 38 million acres were planted in corn and soybeans in 1988. On the 19 million acres planted in corn and soybeans, approximately 1 million tons of nitrogen fertilizer and 50 million pounds of pesticides were applied. Because groundwater is the water supply for over 90 percent of rural Illinois, the occurrence of agricultural chemicals in groundwater in Illinois is of interest to the agricultural community, the public, and regulatory agencies. The occurrence of agricultural chemicals in groundwater is well documented. However, the extent of this contamination still needs to be defined. This can be done by randomly sampling wells across a geographic area. Key elements of a random, water-well sampling program for regional groundwater quality include the overall statistical design of the program, definition of the sample population, selection of wells to be sampled, and analysis of survey results. These elements must be consistent with the purpose for conducting the program; otherwise, the program will not provide the desired information. The need to carefully design and conduct a sampling program becomes readily apparent when one considers the high cost of collecting and analyzing a sample. For a random sampling program conducted in Illinois, the key elements, as well as the limitations imposed by available information, are described.

Additional publication details

Publication type Conference Paper
Publication Subtype Conference Paper
Title Survey of rural, private wells. Statistical design
ISBN 0872628175
Year Published 1991
Language English
Publisher Publ by ASCE
Publisher location New York, NY, United States
Larger Work Title Symposium on Ground Water
First page 305
Last page 310
Conference Title Proceedings of the International Symposium on Ground Water in Practice
Conference Location Nashville, TN, USA
Conference Date 29 July 1991 through 2 August 1991