Every year, visitors flock to the plant to take part in hands-on activities, tours, and exhibits that showcase the amazing work of ALCOSAN and its wastewater treatment processes.

Whether you're a curious student, a science enthusiast, or just someone who loves learning new things, ALCOSAN's open house is the perfect opportunity to explore and discover. You'll have the chance to get up close and personal with the cutting-edge technology that powers ALCOSAN's work, and learn about the important role the plant plays in keeping our waterways clean and healthy.

But it's not just about education - ALCOSAN's open house is also a ton of fun! With a wide variety of activities and exhibits to explore, you're sure to find something that piques your interest. From hands-on experiments to interactive displays, there's plenty of opportunities to engage with the science behind wastewater treatment in a way that's both entertaining and informative.

So if you're looking for a day full of exploration, discovery, and fun, make sure to mark your calendar for ALCOSAN's annual open house - it's an event you won't want to miss!

Open House 2023

Looking for a fun-filled day with your friends and family? Look no further than ALCOSAN's 2023 Open House! This award-winning event is back and better than ever, with free admission for everyone.

Get ready to be amazed as you explore informative and entertaining exhibits suitable for all ages. You'll learn about our efforts to support the Clean Water Plan, and see firsthand the construction of our treatment plant. Rain or shine, we guarantee a fantastic day of fun and education.

And that's not all! As a thank you for attending, we'll even treat you to a delicious lunch. So bring your appetite and get ready for a day filled with excitement and discovery.

Mark your calendars for Saturday, September 16th from 9am-4pm and be sure to visit our website for more information in the coming weeks. We can't wait to see you at ALCOSAN's 2023 Open House!

Open House 2022

Thank you to everyone for another successful and fun filled Open House. We hope that you learned about our Clean Water Plan and enjoyed the Plant Tours.


Virtual Open House 2021

Thanks for attending our virtual Open House. We hope you enjoyed the videos, and perhaps learned a little about the important work ALCOSAN is doing.  If you didn’t attend our Open House, or want to go back and view something again, we’ve kept the page available.

Open House 2021


Virtual Open House 2020

View some of our past videos and educational materials from ALCOSAN's first all Virtual Open House.

Open House 2020

See the Fun from 2019

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Annual Open House

Learn more about our free annual open house event.

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