3 Rivers Proud

When our water's cleaner, we all win.

Keeping our rivers clean is a challenge that we all must accept. But who better to take on that challenge than all Allegheny County residents and ALCOSAN.

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Want to know when overflows are affecting our waterways?

What are overflows?

During rainstorms and heavy snowmelt, too much water enters the ALCOSAN system, triggering overflows of diluted untreated wastewater into the rivers.

Remove it. Hold it. Move it. Treat it.

Discover the four ways to manage overflows caused by excess rainwater:

How much wastewater does ALCOSAN treat?

Up to 250,000,000 gallons a day. That’s 5,000,000 50-gallon bathtubs!