Hands-On Exhibits
Explore educational displays and interactive activities designed to make science, engineering and clean water engaging for every age.
80th Anniversary · 1946 — 2026
ALCOSAN’s 2026 Open House
80 years of service. A day of discovery.
Thank you to everyone who joined us on September 19 to celebrate clean water, community and 80 years of ALCOSAN. Nearly 2,000 people visited our plant for a day of exploration, learning and family fun.
· 24th Annual Open House
A look back at 2026
Celebrating 80 Years of Clean Water Progress
Our 24th Annual Open House brought the community together to explore the work—and meet the people—helping protect our region’s waterways.
Visitors discovered local aquatic life in our new 2,000-gallon river-water fish tank and explored eight decades of history through the “80 Years of ALCOSAN” exhibit. Plant and laboratory tours, hands-on activities in the Clean Water Zone and visits with Frankie the Fish made the day memorable for all ages.
Thank you to our visitors, staff and everyone who helped make this anniversary celebration special.
Explore, discover and celebrate
What is Open House?
Every year, visitors come to ALCOSAN for hands-on activities, plant tours and exhibits that showcase our work and wastewater treatment processes. Whether you are a curious student, a science enthusiast or simply enjoy learning something new, Open House is the perfect day to explore and discover.
From interactive experiments to the technology helping keep our waterways clean, there is something for everyone—and it is as fun as it is educational.
Eight decades of public service
A legacy worth celebrating
80
Years of Service
24
Open Houses
Nearly
2,000
2026 Visitors
83
Communities Served
Explore Open House
Discover ALCOSAN from the inside out
Follow the journey of clean water while exploring the work shaping the future of our region.
Plant Tours
Go behind the scenes to see the systems, technology and skilled professionals involved in treating wastewater.
Clean Water Progress
Learn how plant expansion and other Clean Water Plan projects are protecting rivers and streams for generations to come.
Family Fun
Enjoy a welcoming community event filled with discovery, memorable activities and opportunities to learn together.