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Cover image for Land-cover changes associated with oil and natural-gas production and concentrations of selected constituents in surface-water and streambed-sediment samples collected upstream from and within an area of oil and natural-gas production, South Texas, 2008-17

Land-cover changes associated with oil and natural-gas production and concentrations of selected constituents in surface-water and streambed-sediment samples collected upstream from and within an area of oil and natural-gas production, South Texas, 2008-17

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Cover image for Occurrence and concentrations of selected trace elements, halogenated organic compounds, and polycyclic aromatic hydrocarbons in streambed sediment and results of water-toxicity testing in Westside Creeks and the San Antonio River, San Antonio, Texas, 2014

Occurrence and concentrations of selected trace elements, halogenated organic compounds, and polycyclic aromatic hydrocarbons in streambed sediment and results of water-toxicity testing in Westside Creeks and the San Antonio River, San Antonio, Texas, 2014

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Cover image for Sediment characteristics in the San Antonio River Basin downstream from San Antonio, Texas, and at a site on the Guadalupe River downstream from the San Antonio River Basin, 1966-2013

Sediment characteristics in the San Antonio River Basin downstream from San Antonio, Texas, and at a site on the Guadalupe River downstream from the San Antonio River Basin, 1966-2013

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Cover image for Origin and characteristics of discharge at San Marcos Springs, south-central Texas

Origin and characteristics of discharge at San Marcos Springs, south-central Texas

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Cover image for Water-level altitudes and continuous and discrete groundwater quality at and near an aquifer storage and recovery site, Bexar, Atascosa, and Wilson Counties, Texas, June 2004-September 2011

Water-level altitudes and continuous and discrete groundwater quality at and near an aquifer storage and recovery site, Bexar, Atascosa, and Wilson Counties, Texas, June 2004-September 2011

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Cover image for Origin and characteristics of discharge at San Marcos Springs based on hydrologic and geochemical data (2008-10), Bexar, Comal, and Hays Counties, Texas

Origin and characteristics of discharge at San Marcos Springs based on hydrologic and geochemical data (2008-10), Bexar, Comal, and Hays Counties, Texas

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Cover image for Surface-water quality in the upper San Antonio River Basin, Bexar County, Texas, 1992-98

Surface-water quality in the upper San Antonio River Basin, Bexar County, Texas, 1992-98

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