AP Chemistry Students Explore Water Purification at the Local Water District

Students in Advanced Placement Chemistry and Organic Chemistry Honors classes stepped beyond the classroom this week for a firsthand look at one of the world’s most advanced water purification operations during a field trip to the Orange County Water District Groundwater Replenishment System.

Accompanied by chemistry teachers Andrea Chou, Christian Kim and Eric Trumbauer, students explored the facility and the science and engineering behind the underground water replenishment system, where wastewater is transformed into highly purified water through a series of treatment processes. According to Ms. Chou, students observed how chemistry concepts studied in class are applied on an industrial scale to address real-world environmental challenges. “The experience helped bridge textbook learning with practical application,” she said. 

“The tour gave students the opportunity to observe several important chemistry concepts in a real-world setting, especially water purification and environmental chemistry.” 

The students learned how advanced treatment processes such as microfiltration, reverse osmosis, and ultraviolet light with hydrogen peroxide are used to remove contaminants from wastewater and produce high-quality purified water.

The visit provided students with a firsthand opportunity to connect classroom concepts such as solutions, osmosis, and oxidation-reduction reactions to the advanced technology operating throughout the facility. 

Many students said the most surprising aspect of the experience was learning that purified wastewater can ultimately become cleaner than much of the current drinking water supply.

“They were impressed by the scale and sophistication of the facility,” Ms. Chou explained. “Students were fascinated by the multiple layers of treatment and the precision involved in ensuring water safety.”

The field trip reflected the St. Margaret’s commitment to learning beyond the classroom by giving students the opportunity to see how chemistry extends in real-world applications. The chemistry students gained a deeper understanding of how science supports public health, sustainability, and the future of water conservation in Southern California.