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Aquifers | AQUATICS SAMPLE TEST.pdf
Water Budget | Hydrologic Cycle | Water Molecule | What is a Watershed | Drainage Patterns | Stream Order and Stream Types
Competing Uses of Water | Water Pollution | Wetlands | Pond and Lake Ecosystem | Riparian Areas | Laws Protecting Water | Stream Assessment Protocols | Acid Rain | Drinking Water | Watershed Delineation | Source Water | Aquatic Invertebrates | Stormwater | Hydraulic Fracking
Aquifers | AQUATICS SAMPLE TEST.pdf
Pollution comes from various sources. These are referred to as point and non-point sources.
Point source pollution comes from a well-defined and typically known source, such as a pipe or smoke stack. Point source pollutants often are concentrated because they are discharged from a single, or several multiple, known sources. In other words, you can "point" to a source such as a discharge pipe from an industrial facility.
Most of the time a point source can be traced to pipes, smokestacks, sewage treatment plants, outfall pipes, ditches, channels, sewers, containers, or any type of conveyance vessel.

- Excess fertilizers, herbicides, and insecticides from agricultural lands and residential areas;
- Oil, grease, and toxic chemicals from urban runoff and energy production;
- Sediment from improperly managed construction sites, crop and forest lands, and eroding streambanks;
- Salt from irrigation practices;
- acid drainage from abandoned mines;
- Bacteria and nutrients from livestock, pet wastes, and faulty septic systems; and
- Atmospheric deposition and hydromodification.
Additional Information:
- Point and Nonpoint Source Pollution
- Basic Information About Nonpoint Source (NPS) Pollution
- Point Source Pollution
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