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In this activity (on pages 29-35), learners examine water pollution and filtration.

$1 - $5 per group Ages 8 - 14 45 to 60 minutes
Source Institutions
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In this activity on page 7 of the PDF (Water in Our World), learners make their own water treatment systems for cleaning water.

$5 - $10 per student Ages 8 - 14 45 to 60 minutes
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Water treatment on a large scale enables the supply of clean drinking water to communities.

$5 - $10 per group Ages 11 - adult 45 to 60 minutes