Estimating the Probability of Elevated Nitrate Concentrations in Ground Water in Washington State

Scientific Investigations Report 2008–5025

U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2008–5025

Figure - refer to figure caption for alternative text description

Figure 4. Nitrate concentrations in ground-water samples collected in hydrogeomorphic regions in Washington from the Washington State Department of Health database (1995–2006).

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