"Hey Siri, How Do I Purify Water?"


In this activity, students will take part in a demonstration of the processes used to purify drinking water in rural areas. Students will receive a brief overview of a typical drinking water treatment train, illustrating how their drinking water is kept safe in New York City. Students will then take a sample of contaminated water and add a coagulant/oxidizer powder which will lead to the water being safe to drink (though the students will not be allowed to drink it).

Offered At

Columbia Engineering

Columbia Engineering Outreach Programs aim to provide greater accessibility to academic and professional opportunities in science, technology, engineering, and mathematics (STEM) disciplines, especially for traditionally underrepresented local stakeholders. Through community engagement, we enhance the quality and reach of learning at all levels.

Our updated Inside Engineering program now brings Columbia Engineering lab content straight to you! These now are featured in the format of hands-on, engaging engineering design activities and lessons that you can do right in your own homes or classrooms.

The Engineering Speaks program now accommodates remote sessions that allow K-12 students to hear directly from engineers from Columbia University, through virtual panels, workshops, and seminars.



Science, Engineering, Water Testing


35 students, 1 chap. per 35 stu.


45 min.


School Based Program


11, 12

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