Fire departments across the country are required to service fire hydrants twice a year, usually in the spring and fall. NFPA and ISO require that this inspection be done to ensure the hydrants have proper water pressure and operate as they are designed.
The Decatur Fire Department will test fire hydrants in September and October. During the pressure testing and flowing of the hydrants the water can become cloudy due to disturbance within the water pipes. This condition is temporary and usually clears up quickly.