The US Environmental Protection Agency offers some nice resources for teaching about the water cycle and water treatment. Thirstin’s Water Cycle takes students on an animated and narrated tour of the water cycle from water, to vapor, to clouds, to rain. Thirstin’s Tour of a Water Treatment Plant takes students on a narrated tour through a typical water treatment facility found in the United States.

Applications for Education
Both of Thirstin’s narrated tours are designed as supplementary materials to the elementary school lesson plans offered in the teacher’s resources section of EPA.gov.