Saint Patrick's Day in the United States - Wikipedia
Chicago's green river tradition has a surprising connection to
LISTEN: Partnership between plumbers union, boat tour turns
Chicago River turns green for St. Patrick's Day
St. Patrick's Day Chicago, Green River Dyeing & Parades
St. Patrick's Day tradition of dyeing Chicago River a family affair
St. Patrick's Day: Chicago River dyed green annually
St Patrick's Day: Find out the history behind dyeing the Chicago
St. Patrick's Day: Why they began dyeing the Chicago River green : NPR
What Is the Chicago River Dyed With? Behind the Annual Tradition