Hydrant Flushing

What is hydrant flushing?


To clean the water distribution system, CSJMA personnel will systematically open our fire hydrants to increase water flows and velocities within the piping system to “flush” and remove any minerals and/or deposits (iron and manganese) from the pipes. While flushing, you may notice a temporary drop in pressure or discolored water.  These are both expected results from flushing and will return to normal after the flushing activities are complete.


  • Avoid using the washing machine during times of hydrant flushing.
  • If discolored water occurs, simply run the cold water for a few minutes until it clears.  This will allow the sediment to work through your pipes.
  • In some cases, the discoloration may linger for a few hours.  This discoloration of the water only affects the appearance and does not affect the water quality.  No health hazards are associated with discolored water from hydrant flushing.
  • If water pressure remains low after the flushing has been completed, check your faucet screens or any water filters for trapped particles.


  • Flushes sediments from the water lines and improves water quality
  • Verifies proper operation of fire hydrants and valves
  • Verifies amply water flow for fire fighting