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Scientific Investigations Report 2007–5179

U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2007–5179

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Figure - refer to figure caption for alternative text description

Figure 27. Relation of methyl tert-butyl ether (MTBE) detection frequency collected from (A) urban and (B) agricultural areas to dissolved-oxygen concentration within regional National Water-Quality Assessment Program study units in the arid to semiarid Western United States, 1993–2004. See figure 24C for percentage of agricultural and urban wells within each dissolved-oxygen category.

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