Like most Riverfest goers, Gabby and Jacob Marney spent the afternoon walking alongside the Arkansas River.

“It’s definitely a big focal point. Us being new here, we hear stuff about it all the time,” Gabby Marney said.

But what they hadn’t heard about are the flags located on the Douglas and Lewis Street bridges. The flags let festival goers know the water is safe, depending on the color.

“Blue or green means go ahead, get in, recreate. I mean, don’t drink it. That’s just dumb,” President and CEO of Wichita Festivals, Mary Beth Jarvis said.

Specifically, blue means the water is suitable for recreational use. Green flags mean the water is suitable but be sure wash your hands afterward and avoid swallowing the water.

(Read more: KAKE – News)