For a non-point source of light, the shadow is divided into the umbra.

One common result of human activity is the loading of nutrients into the water system through both point and non-point sources.

Other non-point sources of pollution that are attributed to urban areas are covered under different legislation.

This includes non-point source, or diffuse pollution, such as sediment pollution from construction sites.

The Zarqa River is severely polluted by industry, municipal wastewater and non-point sources.

These contaminants could come from point and non-point sources, along with naturally occurring sources, such as:

But scientists say curbing pollution from non-point sources will be a formidable task.

The reason is that much of the nitrogen pollution comes from non-point sources in agriculture, and the still insufficient nutrient removal by wastewater treatment plants.

The Waikato River has a high level of pollution due to various point and non-point sources.

EPA and States made significant gains in documenting the full or partial restoration of waterbodies that are impaired primarily by non-point sources.