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City-owned hydrants are painted yellow as they are tested by the city.
Private hydrants, which are tested and painted by the owner, are painted silver.
The bonnet colors for ALL hydrants are painted in compliance with ISO Flow Standards:Blue: 1,500 gpm (gallons per minute) or greaterGreen: 1,000 to 1,499 gpmOrange: 500 to 999 gpmRed: less than 500 gpm