A mysterious green dye has been spotted in the water along Four Mile Run Dr. near S. George Mason Dr.
Arlington County Fire Department’s Hazmat team is on the scene. They say the dye is a non-hazardous drainage detection substance. Bags of this type of dye are sometimes released into a building’s drainage system to make sure there are no leaks or breaks. A nearby building performed this type of test today, and it drains into the creek at Four Mile Run.
The dye does appear to be moving downstream, so other areas may soon see a green hue in the water.