SPOKANE CO., Wash. – If you see red water in Latah Creek on Monday, do not be alarmed!

Washington State Department of Ecology officials spent Monday testing how fast water moves through the creek (formerly known as Hangman Creek).

WSDOC used a harmless fluorescent dye to turn the creek pink. The dye travels through the creek and the color is read by equipment placed downstream. This helps scientists collect data that will ultimately give them a better understanding of pollution’s influence on the area.

Scientists said this study, and others, will help them make recommendations and focus their work to improve the creek’s health.