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Water quality --- Water-supply --- Aquifers --- Measurement. --- National Water-Quality Assessment Program (U.S.)
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Water quality --- Groundwater --- Quality
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Water quality --- Groundwater --- Measurement. --- Quality --- National Water-Quality Assessment Program (U.S.)
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Water quality --- Water-supply --- Aquifers --- Aquifers. --- Water quality. --- Water-supply. --- Measurement. --- National Water-Quality Assessment Program (U.S.) --- Texas
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Water quality --- Water-supply --- Aquifers --- Measurement. --- National Water-Quality Assessment Program (U.S.)
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Water quality --- Groundwater --- Measurement. --- Quality --- National Water-Quality Assessment Program (U.S.)
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Water quality --- Water quality --- Water-supply --- Aquifers --- Measurement. --- National Water-Quality Assessment Program (U.S.) --- National Water-Quality Assessment Program (U.S.) --- Texas
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Water quality --- Groundwater --- Quality
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Pesticides --- Drinking water --- Water --- Environmental aspects --- Pesticide content
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Pesticides --- Drinking water --- Water --- Environmental aspects --- Pesticide content
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