CEDAR RAPIDS, Iowa - We know what it is.
That mysterious white powder that fell like snow in a neighborhood in Southwest Cedar Rapids last week is being identified.
Surveillance video of the substance shows white flakes falling.
The city took a sample of the white powder to a lab for analysis, and it turns out it is a plant based residue that came from a local factory.
KCRG-TV 9 in Cedar Rapids reports the company may be cited for the discharge.