Clean Water Act — 50th Anniversary Celebration!

We’re proud to celebrate the 50th anniversary of the U.S. Clean Water Act (CWA)!

If you’re as excited about this milestone as we are, bookmark this page and check out all the ways to join in on the festivities. Keep an eye out for future updates throughout the year!

What's New?

It’s time to test your knowledge of the CWA! Play our 1st round of trivia and be entered to win an amazing prize package!

We’re also excited to introduce Matthew Norberg and Harry Stone, our first two CWA Water Heroes Contest finalists

CWA Trivia

How well do you know the CWA? Test your knowledge by answering 10 quick trivia questions. Play for your chance to win one of our fantastic prize packs!

Test Your Knowledge!

Water Hero Finalists

YSI is thrilled to highlight the fantastic work of our CWA Water Hero Finalists. We’ve selected our first two finalists, and we have one more to announce later this month!

View Finalists

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About the Clean Water Act

Dive into the rich history behind the CWA—and learn more about the series of ecological disasters in the U.S. that led to it becoming law!

Learn More

Upcoming Events

We're celebrating the 50th anniversary of the Clean Water Act all year long. Check out upcoming virtual and in-person events where you can join us!

View Events

Countdown to
the 50th Anniversary
of the Clean Water Act


Featured Fact

Did you know the CWA was amended in 1987? Among other improvements, the update introduced the Section 319 Grant Program that provides states funding to address nonpoint source pollution.


Three Things You Didn't Know About the CWA

Find out three facts you maybe didn't know about the Clean Water Act.

Coming Soon

CWA 50th Event Sidebar WEFTEC