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point source pollution

Pollutants discharged from a single identifiable location (e.g., pipes, ditches, channels, sewers, tunnels, containers of various types).

non-point source pollution

water pollution that does not have a specific point of origin

acid mine drainage

the acidic water with elevated concentrations of dissolved metals that drains from coal or metal mines.

storm water runoff

Water that drains into a water source after a rain storm occurs. This is the number one cause of non point source pollution in Pennsylvania.

yellow boy

Yellowish-orange precipitate that results from acid mine drainage. Covers the stream bottom and diminishes fish and aquatic insect habitat.


the dirt that settles on the bottom of a body of water stream, lake, or ocean

algal bloom

an immediate increase in the ammount of algae and other producers that results from a large input of a limiting nutrient

dead zone

an area with very little oxygen where organisms can't survive

cultural eutrophication

Overnourishment of aquatic ecosystems with plant nutrients (mostly nitrates and phosphates) because of human activities such as agriculture, urbanization, and discharges from industrial plants and sewage treatment plants.

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