Copied from another page: Whats that sound in your neighborhood? Oh that's sandblasting and priming fire hydrants. This work keeps the fire hydrants in our neighborhoods looking presentable. Most importantly per the National Fire Protection Agency (NFPA), the village hydrants will be uniformly color-coded to indicate water-flow capabilities to inform our firefighters. The water flow capabilities come from the villages annual fire hydrant flow testing. For more information please call Niles Public Works at 847-588-7900 Here is a short video so you can watch how some of the work is performed. Village of Niles - Municipality Niles-Maine District Library Niles Chamber of Commerce and Industry Niles Journal Niles Senior Center Niles Park District Niles Police Department (IL) Niles Fire Department APWA Chicago Metro #NilesPublicWorks #FirstResponders