What are some point source (direct ) ways of water contamination?

Question

i need 10 examples. thanks

Answer 1

Point source pollution is pollution discharged or stemming from a single source.
Non-point source pollution is pollution generated from a diffuse source rather than one specific, identifiable source. Heavy rainfall often increases non-point pollution by washing sediment and contaminants from fields and cities into surface water.

Water contamination is different from water pollution. Water contamination is the dirtying of water resources through natural processes. Water pollution is the dirtying of water resources, mostly by human-generated wastes.


Intensive field investigations are established at representative sites contaminated with predominant types of environmental contamination, in commonly occurring geohydrologic and geochemical settings. Contamination types currently under investigation include chlorinated solvents, sewage effluent, toxic metals, radionuclides, and petroleum products, including fuel oxygenates. These long-term research projects are conducted by interdisciplinary research teams that comprehensively identify and characterize the physical, chemical, and biological processes that affect contaminant transport, transformation, and fate at the site.


http://imnh.isu.edu/waterdiscoverybox/SubMenu6/content_wastewater_temp.htm

http://toxics.usgs.gov/investigations/subsurface.html