The Local Tourist, NBC5 Street Team

It's world water week, and UNICEF is raising money to provide clean water to children in developing nations. Many, many years ago the Chicago River was reversed to stop the pollution of Lake Michigan, where Chicagoans get their drinking water. When was this engineering feat achieved?

Email your answer and your mailing address to trivia@thelocaltourist.com

This week's prize is two tickets to Art 'N Soul, a wine and chocolate tasting featuring live music by Nina Rae N'Time. The event takes place on April 11 at Big City Swing and is hosted by 220 Communications.

Congratulations to Rachel S. She knew that the Chicago Journeymen Plumbers spill the dye into the river each year and she receives the framed photo that was chosen to appear in Schmap Guide To Chicago.