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scientific figure - maps of lower 48 us showing contamination
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Frequency of mean seasonal flow-weighted total nitrogen and total phosphorus concentrations exceeding the US Environmental Protection Agency National Rivers and Streams Assessment “poor” criteria for 2000–2020.

Figure 5 from Miller, O. L., Schmadel, N. M., Ator, S. W., Miller, M. P., Robertson, D. M., Saad, D. A., et al. (2026). Seasonal estimates of nutrient loading, sources, and impacts on water availability in streams across the conterminous United States, 2000–2020. Water Resources Research, 62, e2025WR043133. https://doi.org/10.1029/2025WR043133

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Related

Seasonal estimates of nutrient loading, sources, and impacts on water availability in streams across the conterminous United States, 2000–2020 Seasonal estimates of nutrient loading, sources, and impacts on water availability in streams across the conterminous United States, 2000–2020

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Read Article
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