1. FRESHWATER EXTENT OF THE CHICOT AQUIFER SYSTEM IN LOUISIANA
2. LOCATION OF HYDROGEOLOGIC SECTION LINES
3. BASE OF CHICOT AQUIFER SYSTEM North & South

PROBLEMS/CONCERNS
•Water-level declines
•Saltwater encroachment
•Contamination

• GROUND-WATER WITHDRAWALS IN LOUISIANA BY PARISH, 2000
• WITHDRAWALS FROM THE CHICOT AQUIFER SYSTEM, 2000
• GROUND-WATER WITHDRAWALS IN CALCASIEU PARISH, 1955 - 2000

Water levels declined about 5 ft per year in the “500-foot” sand in the Lake Charles industrial district between 1945 and 1970.
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Water levels at 3 wells in the Lake Charles industrial district 1965–2005. The Sabine River Diversion Canal was completed In 1982. Water levels in all 3 sands rose in response to pumping changes in the “500-foot sand.
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• WATER-LEVEL SURFACE IN THE “200-FOOT” SAND, FALL 1995
• WATER-LEVEL SURFACE IN THE “200-FOOT” SAND, SPRING 1995
• WATER-LEVEL SURFACE IN THE “500-FOOT” SAND, FALL 1995

• Detail of water-level surface in the “500-foot” sand in the Lake Charles industrial district, fall 1996
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• WATER-LEVEL SURFACE IN THE “700-FOOT” SAND, SPRING 1995

• AREAS OF SALTWATER IN THE “200-FOOT” SAND, 1995

• AREAS OF SALTWATER IN THE “500-FOOT” SAND, 1996

AREAS OF SALTWATER IN THE “500-FOOT” SAND IN THE LAKE CHARLES INDUSTRIAL DISTRICT, 1996
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Chloride concentrations in the “500-foot” sand in the Lake Charles industrial district, 1996
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AREAS OF SALTWATER IN THE “700-foot” SAND, 1996

For more information on ground-water conditions in Louisiana, visit the USGS Louisiana District web site at: la.water.usgs.gov

or contact John Lovelace by phone at (225) 389-0281 ext. 3210 or by email to jlovelac@usgs.gov