While fire hydrants are traditionally painted bright red or yellow for high visibility, municipalities often use specific bonnet (top cap) and nozzle color codes to indicate the available water flow capacity (in gallons per minute) to firefighters during emergencies. Standard NFPA guidelines designate light blue for very high flow (1500 GPM or more), green for high flow (1000 to 1499 GPM), orange for moderate flow (500 to 999 GPM), and red for low flow capacity (under 500 GPM). Verification: Consult your local municipal water department or fire district guidelines to review their specific hydrant color-coding standards.
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