Water Pollution Point Source vs. Nonpoint Source Pollution Point Source vs. Nonpoint Source Pollution

Water pollution Bacteria,Viruses,Protozoa, Parasitic worms Oxygen demanding substances Inorganic plant nutrients Organic chemicals Sediment or suspended matter Thermal pollution Genetic pollution

How great is our water???WaterQualityGood 8-9 Do (ppm) at 20˚C Slightlypolluted Moderatelypolluted Heavilypolluted Gravelypolluted Below 4.5 Below 4 Pg. 535 Dissolved Oxygen levels in water

Point Source Pollution comes from a specific source, like a pipe factories, industry, municipal treatment plants can be monitored and controlled by a permit system Basically, a source you can directly “point” to!

Nonpoint Source (NPS) Pollution is pollution associated with stormwater or runoff NPS pollution cannot be traced to a direct discharge point such as a wastewater treatment facility Nonpoint Source Pollution When you can’t pinpoint any one particular source.

Examples of NPS oil & grease from cars fertilizers animal waste grass clippings septic systems sewage & cleaners from boats household cleaning products litter

“People Pollution”

Point and Nonpoint Sources NONPOINT SOURCES Urban streets Suburban development Wastewater treatment plant Rural homes Cropland Factory Animal feedlot POINT SOURCES

Fig Aquifer Water well Migrating vapor phase Contaminant plume moves with the groundwater Free gasoline dissolves in groundwater (dissolved phase) Groundwater flow Water table Gasoline leakage plume (liquid phase) Leaking tank Bedrock

Global Outlook: Stream Pollution in Developing Countries Water in many of central China's rivers are greenish black from uncontrolled pollution by thousands of factories. Figure 20-7

Case Study: India’s Ganges River: Religion, Poverty, and Health Daily, more than 1 million Hindus in India bathe, drink from, or carry out religious ceremonies in the highly polluted Ganges River.

Point Source or Nonpoint Source? Point Source

Point Source or Nonpoint Source? Nonpoint Source

Point Source or Nonpoint Source? A factory dumping extremely hot water into a river? Point Source

Point Source or Nonpoint Source? Oil dripping from cars on a road and flowing into the storm drain. Nonpoint Source

Roger Rosenblatt It is a hard truth to swallow, but nature does not care if we live or die. We cannot survive without the oceans, for example, but they can do just fine without us.