To flush or not to flush ... that is the question. Is the wastewater treatment program in most towns and cities really the most efficient way to deal with waste? The fourth installment in a series of seven videos about the world's water...

With so much water everywhere, how is it that people around the world don't have clean water for drinking and bathing? Part three in a seven-part series describing Earth's water resources introduces the class to the process of water...

How do we know when water is safe to drink? Part seven of a 10-part videos series uses water quality as a platform to explore the behavior of halide ions in solution, Further tests help learners differentiate between precipitates that...

Geologist Dr. Bob Raynolds and space scientist Dr. Ka Chun Yu explain the planetary processes that affect water supplies around the world and in the American West. Aired May 24, 2011. [1:14:41]

In this video from Common Ground and Cleaner Water, Tribby Vice, a Kentucky farmer, talks about the changes he has made on his farm to protect the water quality of the stream running through his property and the watershed in which he...

In this video, a high school teacher and her students construct and install a Hester-Dendy sampler to collect macroinvertebrates. Learn how macro invertebrates can be an indicator of water quality. [3:03]

A video demonstrating how to use macro invertebrates to explore water quality.Follow a high school class on their journey to figure out the water quality in their area. [1:55]

Students test a variety of filter materials to see how well they remove particles and color from contaminated water. [10:26]

A storybook introduces the engineering challenge and context. In this story, Salila, a girl from India, learns about environmental engineering as she designs her own water filter. [15:34]

A scientist discusses her work studying the travel times of pollutants in waterways around Baltimore's Chesapeake Bay, which is on the brink of an environmental crisis. Her research team is trying to understand how this urban water cycle...

A quick, by necessity, discussion of watersheds with a great demo using a very good watershed model (Enviroscape) plus a couple of student tips. [10:04]

The estuary stands as the last barrier between the Pacific Ocean and pollution. Its mix of plants and silt acts as a filter that purifies contaminated inland rain and flood waters before they reach the ocean. [3:47]

Learn about contaminants that can make water unsafe for humans, and of methods being used to purify it, e.g., through flocculation.

Observe a teacher's lesson, and see her introduce the engineering challenge of designing water filters with a picture book. In this story, Salila, a girl from India, learns about environmental engineering as she designs her own water...

[Free Registration/Login Required] Students test water from multiple locations on the Potomac River for dissolved oxygen, nitrates, phosphates, pH levels, salinity, and turbidity. What do these tests tell us about the health of the...

How can engineering improve the lives of millions of people? The people of Bangladesh were getting really sick because of the bacteria that they were getting from their water, which was untreated and dangerous. Amy Pickering decided that...

Learn how farm runoff impacts water quality and human health. Tour the water treatment plant in Des Moines, Iowa, and learn how the water is filtered, in this video excerpted from the independent film 'Big River: A King Corn Companion.'...

Learn how waterways are polluted by agricultural pesticides such as atrazine, a herbicide commonly used on corn farms, in this video segment featuring live-action animation adapted from the independent film 'Big River: A King Corn...

The algal turf scrubber uses algae to boost water quality.