What+are+the+some+of+the+potential+places+where+non-point+or+point+sources+can+cause+dead+zones?

hat are the some of the potential places where non-point or point sources can cause dead zones?

=Gulf of Mexico Dead Zone:= http://www.smm.org/deadzone/affected/top.html Location: Gulf of Mexico' Size: 8400 square miles

What: The Gulf of Mexico Dead Zone is a large region of water that is very low in oxygen, and therefore can't support life. It's located around the mouth of the Mississippi River and is the largest in the world. Causes: Nitrogen and phosphorous from things such as fertilizers, soil erosion, animal wastes, and sewage runs down the Mississippi and into the Gulf of Mexico.

=Hood Canal Dead Zone:= = = = = = =

Hood Canal is one of the dead zones in the United States. Hood Canal was predicted to be in a perilous state when countless shrimp, crab, lingcod and other fish died in September, 2006. The cause of the death of numerous number of organisms was that The canal had very low oxygen levels as it entered a period of peak vulnerability in the summer and early fall. Also, the researchers for the Skokomish Indian Tribe reported that the the widespread nature of dire conditions could have affected the death of organisms. They found dead Dungeness crabs and fish floating in places where white, jellylike underwater mats of bacteria exist. To solve this catastrophe, state, tribal, and local authorities have gone through projects on septic repairs, public education and sewage improvements in recent years. One of the project is called the Hood Canal Dissolved Oxygen program which has been formed by 38 groups to try to combat the problem. The cost of the Hood Canal Dissolved Oxygen Program is 1.12 million dollars. According to the University of Washington, the potential cause of the dead zone in Hood Canal is the excess amount of nitrogen. Excess nitrogen are caused by many sources, such as nitrogen from septic tanks, Alder trees, pets, and many others nitrogen sources. [] [|http://en.] [|wikipedia.org/wiki/Hood_Canal]  [|www.hoodcanal.washington.edu/.../last_hc_02.jpg] []