08/17/2026
🚒💧 DID YOU KNOW? FIRE HYDRANT COLORS HAVE A PURPOSE.
Those colors on a fire hydrant are not just for appearance. They help firefighters quickly identify a hydrant’s flow classification and potential water supply during an emergency.
According to NFPA 291, hydrant bonnet and nozzle cap colors are commonly used to indicate flow capacity:
🔵 Blue – 1,500+ GPM
🟢 Green – 1,000–1,499 GPM
🟠 Orange – 500–999 GPM
🔴 Red – Less than 500 GPM
You may also see:
🟣 Purple (Violet) – Non-potable or reclaimed water
⚪ White – Drafting hydrant (local designation)
⚫ Black – Out of service (local designation)
⚠️ Keep in mind that hydrant markings can vary depending on the local water utility or jurisdiction.
Why does this matter?
When firefighters arrive at a fire, they must quickly determine if a hydrant can provide enough water to support firefighting operations. Knowing the hydrant’s flow classification helps crews make faster decisions and establish an effective water supply.
🚫 Never park in front of a fire hydrant.
🚫 Never block access to a hydrant.
A hydrant that cannot be accessed quickly can delay firefighting operations when every second counts.
Fire is fast.
Water supply matters.
Knowledge saves lives. 🚒🔥