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Where Does Tahoe's Water Pollution Come From?

TitleWhere Does Tahoe's Water Pollution Come From?
Author/CreatorCobourn, John; Purdy, Shelly; Segale, Heather M.
Related item(s)Press Release available at
Date Original2004
Summary/DescriptionLake Tahoe Report Segment # 8 - "Major Types Of Pollution" (Air Date: March 25, 2003). John Cobourn from the University of Nevada at Reno Cooperative Extension, and Heather Segale from the Lake Tahoe Environmental Education Coalition, discuss the different types of pollutants affecting Lake Tahoe.
SubjectWater -- Pollution -- Tahoe, Lake, Region (Calif. and Nev.)
LocationLake Tahoe (Calif. and Nev.)
Tahoe, Lake (Calif. and Nev.)
CollectionThe Lake Tahoe Report
Original PublisherLake Tahoe Environmental Education Coalition (
Electronic PublisherUniversity of Nevada, Reno - Department of Teaching and Learning Technologies
Ordering and Permissions InformationFor more information, contact the University of Nevada Cooperative Extension, or 775-832-4138.
Date Digital2004-12-06
RelationRequires Windows Media Player
Resource TypeMoving Image
Contributing InstitutionUniversity of Nevada, Reno
TranscriptionSegment 8 - Air Date: March 25 ((ANCHOR INTRO)) You can't seem to talk about Lake Tahoe these days without talking about pollution. In tonight's Lake Tahoe Report, Shelly Purdy defines the different types of pollution and how they can affect you. ((TAKE PKG)) ((Track 1)) There are 6 main categories of pollution, and when you?re talking about Lake Tahoe some are more damaging than others. The sun, for instance, can be a pollutant if it causes abnormally high water temperatures. Animal waste carries pathogens that can cause disease. And toxins like pesticides and used motor oil also pollute the water. But at Lake Tahoe the two major sources of pollution are nutrients and sediments. Nutrients are found in fertilizer - a substance that makes plants grow is very damaging to the lake. ((SOT tape 6 @ 9:10 John Cobourn, UNR Cooperative Extension)) "Because we don't want to promote plant growth in Lake Tahoe. That's one of the things that's clouding it and causing it to turn green." ((Track 2)) The other pollutant affecting Lake Tahoe is sediment. This simple experiment using a teaspoon of dirt in a water bottle shows just how damaging sediment can be. ((SOT tape 6 @ 14:20 Heather Segale, Lake Tahoe Environmental Education Coalition)) "The larger particles of soil and sand and small rocks will actually fall out immediately. But you can see that the smaller parts of soil will stay suspended in the water. These microscopic sized particles will stay there quite a long time in suspension." ((Track 3)) It's a simple but perfect illustration of why it's so important to control soil erosion and keep sediment from getting into the lake. With the Lake Tahoe Environmental Education Coalition, I'm Shelly Purdy for News Channel 8. ((ANCHOR TAG/STILL STORE)) For more information about the different types of pollution and for instructions on how to do the sediment test with your kids, visit our website at and go to the links page.

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