Serving the Western Suburbs of Pittsburgh

September 21, 2026

ALCOSAN celebrates 80th birthday with open house Saturday

Nearly 2,000 people turned out Saturday for the Allegheny County Sanitary Authority’s 24th annual open house, which celebrated 80 years of service.

New this year, ALCOSAN debuted a 2,000-gallon river-water fish tank, giving visitors a close-up look at the variety of fish in our local waterways. Guests also explored eight decades of ALCOSAN history through videos, photos and artifacts in the new “80 Years of ALCOSAN” exhibit.

Aletta Scott Williams, ALCOSAN’s executive director, noted that the authority has been a part of the region’s fabric for 80 years, with a shared commitment to protect the area’s waterways.

“Open House is one of our favorite opportunities to welcome our community, share the work we do and introduce them to the dedicated people who make it all possible,” Williams said.

ALCOSAN is in the midst of implementing its $2 billion Clean Water Plan, a 15-year effort to modernize the region’s wastewater system and reduce combined-sewer overflows by about 7 billion gallons annually by 2036.

McKees Rocks is among the communities affected by the project, as it is the site of the Ohio River Tunnel, which is expected to run nearly 5 miles underground and carry wet-weather sewage to the ALCOSAN treatment plant.

For more information about ALCOSAN and its community programs, visit alcosan.org.

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