This data set consists of the remaining 6,701 water-level records formatted in the "infoGW" object format that met specific criteria for the visGWDB groundwater-level informatics software framework. This criteria ensures that the water-level records were representative of true groundwater conditions in the Chicot aquifer system and associated aquifer units in southwestern Louisiana.

This dataset contain the final 6,298 water-level records that met all threshold criteria and had absolute residuals (ABS_PSEUDO_LEVRES) not exceeding 20 feet and exceeding the 99th percentile. This final dataset is considered a best representation of the true water levels in the aquifer.

This dataset contain the final 6,298 water-level records that met all threshold criteria and had absolute residuals (ABS_PSEUDO_LEVRES) not exceeding 20 feet and exceeding the 99th percentile. This final dataset is considered a best representation of the true water levels in the aquifer.

The Louisiana Department of Natural Resources' (LaDNR) Strategic Online Natural Resources Information System (SONRIS) is a repository for well information that includes date of completion, well construction, geology, and water levels. Well information provided by the water well drillers during the permitting process is updated periodically by LaDNR. Well information is available in SONRIS as early as 1930 to the present. This data set consist of 20,759 well records extracted from SONRIS that were likely drilled in the Chicot aquifer system in southwestern Louisiana.

The Louisiana Department of Natural Resources' (LaDNR) Strategic Online Natural Resources Information System (SONRIS) is a repository for well information that includes date of completion, well construction, geology, and water levels. Well information provided by the water well drillers during the permitting process is updated periodically by LaDNR. Well information is available in SONRIS as early as 1930 to the present. This data set consist of 20,759 well records extracted from SONRIS that were likely drilled in the Chicot aquifer system in southwestern Louisiana.

This dataset contains digitized groundwater quality data from 435 wells that are screened in the Chicot aquifer system. Reported values of interest included specific conductance, total dissolved solids, and chloride (Cl) concentration; other parameters and major/trace element concentrations were included if reported. Values listed as “NA” or “-9999” represent data that was not reported in the physical dataset. A concentration of 0 ppm or ppb represents a reported concentration of 0 and not a null value. Data were collected from scanned versions of well registration records obtained from the Louisiana Department of Natural Resources. Most well registration records may be accessed through Strategic Online Natural Resources Information System (SONRIS database found at https://www.sonris.com), however some records may only be available in hard copy format.

This dataset contains digitized groundwater quality data from 435 wells that are screened in the Chicot aquifer system. Reported values of interest included specific conductance, total dissolved solids, and chloride (Cl) concentration; other parameters and major/trace element concentrations were included if reported. Values listed as “NA” or “-9999” represent data that was not reported in the physical dataset. A concentration of 0 ppm or ppb represents a reported concentration of 0 and not a null value. Data were collected from scanned versions of well registration records obtained from the Louisiana Department of Natural Resources. Most well registration records may be accessed through Strategic Online Natural Resources Information System (SONRIS database found at https://www.sonris.com), however some records may only be available in hard copy format.

The Chicot aquifer system underlies an area of approximately 9,500 mi2 in southwestern Louisiana and is located within the Gulf Coastal Plain physiographic province. The region includes all or parts of 15 parishes -- Vernon, Rapides, Evangeline, Allen, Beauregard, Calcasieu, Jefferson Davis, Acadia, St. Landry, Lafayette, St. Martin, Cameron, Iberia, Vermilion, and St. Mary. The Chicot aquifer system is a major source of groundwater for southwestern Louisiana, accounts for approximately 48 percent of all groundwater use in the State, and provides freshwater for public supply, industry, agriculture, and aquaculture (Collier and Sargent, 2018). Withdrawals of groundwater have created water-level gradients favorable for saltwater encroachment, and future water-availability and production in the region could be impacted by poor water quality. This product is part of a larger study of the Chicot aquifer system in southwestern Louisiana that will benefit local, State, other Federal cooperators, and stakeholders. The extent given here represents the geographic extent of the Chicot aquifer system in southwestern Louisiana and was created using elevation information from U.S. Geological Survey digital elevation models, surface geology maps, and previously published extents (Lovelace and others, 2004; Casarez, 2020).

The Chicot aquifer system underlies an area of approximately 9,500 mi2 in southwestern Louisiana and is located within the Gulf Coastal Plain physiographic province. The region includes all or parts of 15 parishes -- Vernon, Rapides, Evangeline, Allen, Beauregard, Calcasieu, Jefferson Davis, Acadia, St. Landry, Lafayette, St. Martin, Cameron, Iberia, Vermilion, and St. Mary. The Chicot aquifer system is a major source of groundwater for southwestern Louisiana, accounts for approximately 48 percent of all groundwater use in the State, and provides freshwater for public supply, industry, agriculture, and aquaculture (Collier and Sargent, 2018). Withdrawals of groundwater have created water-level gradients favorable for saltwater encroachment, and future water-availability and production in the region could be impacted by poor water quality. This product is part of a larger study of the Chicot aquifer system in southwestern Louisiana that will benefit local, State, other Federal cooperators, and stakeholders. The extent given here represents the geographic extent of the Chicot aquifer system in southwestern Louisiana and was created using elevation information from U.S. Geological Survey digital elevation models, surface geology maps, and previously published extents (Lovelace and others, 2004; Casarez, 2020).

The U.S. Geological Survey in cooperation with the Harris‐Galveston Subsidence District, City of Houston, Fort Bend Subsidence District, and Lone Star Groundwater Conservation District has produced this dataset of water‐level altitudes and water‐level changes in the Chicot, Evangeline, and Jasper aquifers in the Houston‐Galveston region, Texas.This dataset shows current‐year (2015-2016) water‐level altitudes for each aquifer, 5‐year (2011‐16) water‐level changes for each aquifer, long‐term (1990‐2016 and 1977‐2016) water‐level changes for the Chicot and Evangeline aquifers, and long‐term (2000‐2016) water‐level change for the Jasper aquifer. For the 1‐year (2015-16) water‐level changes, data were computed as the difference in water‐level altitude at each point (well) for which a water‐level measurement was made in 2015 and 2016. Five‐year (2011‐16) water‐level changes were computed the same as for the 1‐year water-level changes; the difference in water‐level altitude at each point for which a water‐level measurement was made in 2011 and 2016. The water‐level measurements in the dataset are built upon and stored in the National Water Information System: Web Interface, groundwater information, field measurements website located here: http://dx.doi.org/10.5066/F7P55KJN This site is a publicly available, searchable, online database of water information.