Join our museum’s Gallery Guides for a “drop-in” tour that explores the importance of water and the histories of pollution and protection that have changed our relationship to this vital substance.

Clean water is life, and our scientific understanding of the water cycle’s significance and complexity has grown in the last few centuries.

On this tour, you’ll learn about the gods and powerful beings that were believed to protect flowing waters, how early anti-pollution advocates dealt with crises like thousands of dead fish in the Colorado River, and how chemistry and water knowledge intersect. Find out how Rachel Carson’s Silent Spring, the EPA, and scientists and activists throughout history have fought to protect our waters from contamination.

We’ll also talk about the history of our local water sources in the Delaware Valley, the technological advancements that led to the water systems we have today, and how innovators helped us observe, test, and purify water, first to make it fit for human consumption, and later as a matter of environmental ethics.


Drop-in tours are free and no reservations are necessary.

More events

full-page color ad depicting a grown tree being planted in a landscaped yard
April 22, 2026
Joseph Priestley Society

Greening the Urban Landscape

Hear from Tim Bennett and Peggy Prevoznik Heins on bringing composting services to Philadelphia homes and vegetable gardens to Delaware schools.

visitors and librarians looking at book and archive exhibits on a long table
April 22, 2026
Programs, Lectures & Talks

Othmer Library After Hours

Join us for annual library open house in honor of National Library Week!

page from book with illustration of precipitation, evaporation, and other elements of the hydrologic cycle
April 25, 2026
For Families

Stories of Science: April Showers

Join us in our museum EVERY SATURDAY for a family-friendly program that highlights strange and surprising stories from the history of science!

    Republish

    Copy the above HTML to republish this content. We have formatted the material to follow our guidelines, which include our credit requirements. Please review our full list of guidelines for more information. By republishing this content, you agree to our republication requirements.