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PITTSBURGH (KDKA) – ALCOSAN set out to prove you could have fun at a sewage treatment plant on Saturday.

The 16th annual event featured free exhibits, tours and activities at the wastewater treatment plant, located on Pittsburgh’s North Side.

(Photo Credit: KDKA Photojournalist Tim Lawson)

More than 50 exhibitors were be on hand, including the Ohio River Valley Water Sanitation Commission’s 2,200-gallon aquarium, which offered visitors an up-close view of fish caught in the Ohio River.

Visitors had the opportunity to learn about native and local amphibian species, drive a robot, and design their own watershed, among other activities.

(Photo Credit: KDKA Photojournalist Tim Lawson)

ALCOSAN is an environmental and public health organization, treating wastewater for 83 Allegheny County communities, including the City of Pittsburgh.