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Although these pollutants have originated from a point source, the long-range transport ability and multiple sources of the pollutant make it a nonpoint source of pollution; if the discharges were to occur to a body of water or into the atmosphere at a single location, the pollution would be single-point. Nonpoint source water pollution may ...
The definition of NPS water pollution is open to interpretation. However, federal regulation under the CWA provides a specific legal definition for the term. A "nonpoint source" is defined as any source of water pollution that is not a "point source" as defined in CWA section 502(14). [26]
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.
Water pollution also reduces the ecosystem services such as drinking water provided by the water resource. 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.
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 ...
In many watersheds, nonpoint sources are the principal cause of noncompliance with water quality standards. [105] EPA and states may employ a CWA regulatory mechanism called total maximum daily load (TMDL) to establish stringent pollution controls and may apply the requirements to both point sources and nonpoint sources.
FALL RIVER — "Both sides, at some point, need to become more realistic about what the value of the case is. Try to work it out." Those were the parting words of Fall River District Court Judge ...
Source assessment—identification of sources of pollutants, and magnitude of sources. Load allocation—determination of natural pollutant load, and load from human activities (i.e. diffuse nonpoint sources and point discharges). Set targets—establishment of water quality targets intended to restore or maintain beneficial uses.