Which is an example of nonpoint source pollution?

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Nonpoint source pollution comes from many diffuse origins rather than a single, identifiable outlet. Agricultural runoff across fields fits this pattern because rain can wash fertilizers, pesticides, sediments, and nutrients from numerous fields across a landscape into nearby waterways, making the input come from widespread areas instead of one location. In contrast, a factory discharge from a pipe, a wastewater treatment plant outfall, or a direct chemical spill from a barge all originate from specific, identifiable outlets, classifying them as point sources. So the best example of nonpoint source pollution is agricultural runoff across fields.