Abstract
Abstract : The lower unit of the Chicot aquifer is a major source of freshwater for Orange County Texas. In 1989 the average rate of ground-water withdrawal from the lower unit of the Chicot aquifer in Orange County for municipal and industrial use was 13.8 million gallons per day a substantial decrease from the historical high of 23. 1 million gallons per day in 1972. The average withdrawal for industrial use decreased substantially from 14.4 million gallons per day during 1963-84 to 6.9 million gallons per day during 1985-89. The average withdrawal for municipal use during 1985-89 was 6.8 million gallons per day similar to the average withdrawal of 5.8 million gallons per clay during 1963-84. Water levels in wells in most of the study area rose during 1985-90. The largest rise in water levels was more than 10 feet in parts of Orange and Pinehurst north of site B (one of three areas of ground-water withdrawal for industrial use) while the largest decline in water levels was a localized decline of more than 60 feet at site C in south- central Orange County (also an area of withdrawal for industrial use).
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