Community service is at the heart of a Northwest Catholic education, and all students participate in community service activities throughout their high school careers. There is a special focus on this mission for sophomores, however; they are required to complete 25 hours of community service during 10th grade. Their projects must be corporal or spiritual acts of mercy (i.e. feeding the hungry, visiting the sick, or helping the homeless).
Each December, the Freshman class collects toys for the Connecticut Children's Medical Center. Sophomores hold a turkey drive in November. The Social Action Committee holds an annual food drive and works regularly at soup kitchens. Northwest Catholic students form teams for Relay for Life to support the American Cancer Society. Students create and sell hand-painted ceramic bowls as part of two Empty Bowls Dinners.
In addition, some students seek (and receive permission to operate) special collections and activities for various causes. In the spring of 2007, for instance, several Northwest Catholic students teamed up with their counterparts at the other high schools in town to hold a "Dance for Darfur" to raise funds and awareness. In 2008, a senior spent her vacation building a house in Mexico and collected toiletries from NWC students to bring with her.