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  2. Nonpoint source pollution - Wikipedia

    en.wikipedia.org/wiki/Nonpoint_source_pollution

    Although this is a point source, due to the distributional nature, long-range transport, and multiple sources of the pollution, it can be considered as nonpoint source in the depositional area. Atmospheric inputs that affect runoff quality may come from dry deposition between storm events and wet deposition during storm events.

  3. Nonpoint source water pollution regulations in the United ...

    en.wikipedia.org/wiki/Nonpoint_source_water...

    Nonpoint source (NPS) water pollution regulations are environmental regulations that restrict or limit water pollution from diffuse or nonpoint effluent sources such as polluted runoff from agricultural areas in a river catchments or wind-borne debris blowing out to sea. In the United States, governments have taken a number of legal and ...

  4. United States regulation of point source water pollution

    en.wikipedia.org/wiki/United_States_regulation...

    The Clean Water Act has made great strides in reducing point source water pollution, but this effect is overshadowed by the fact that nonpoint source pollution, which is not subject to regulation under the Act, has correspondingly increased. [41] One of the solutions to address this imbalance is point/nonpoint source trading of pollutants.

  5. Water pollution - Wikipedia

    en.wikipedia.org/wiki/Water_pollution

    Sources of water pollution are either point sources or non-point sources. [4] Point sources have one identifiable cause, such as a storm drain, a wastewater treatment plant, or an oil spill. Non-point sources are more diffuse. An example is agricultural runoff. [5] Pollution is the result of the cumulative effect over time. Pollution may take ...

  6. Point source pollution - Wikipedia

    en.wikipedia.org/wiki/Point_source_pollution

    A point source of pollution is a single identifiable source of air, water, thermal, noise or light pollution. A point source has negligible extent, distinguishing it from other pollution source geometrics (such as nonpoint source or area source). The sources are called point sources because in mathematical modeling, they can be approximated as ...

  7. Water pollution in the United States - Wikipedia

    en.wikipedia.org/wiki/Water_pollution_in_the...

    Nonpoint source pollution is the most common type of pollution because as rainfall runs off of land on its path to different water sources, it becomes contaminated by pollutants from the surrounding area. These sources include agriculture related pollutants, urban runoff, or drainage. The CWA does not authorize the issuance of NPDES permits for ...

  8. Coastal hazards - Wikipedia

    en.wikipedia.org/wiki/Coastal_hazards

    Pollution, trawling, and human development are major human disasters that affect coastal regions. There are two main categories related to pollution, point source pollution, and nonpoint source pollution. Point source pollution is when there is an exact location such as a pipeline or a body of water that leads into the rivers and oceans.

  9. Eutrophication - Wikipedia

    en.wikipedia.org/wiki/Eutrophication

    Nonpoint sources of pollution are the primary contributors to eutrophication, and their effects can be minimized through common agricultural practices. Reducing the amount of pollutants that reach a watershed can be achieved through the protection of its forest cover, reducing the amount of erosion leeching into a watershed.