A boil water notice is issued:
- if tests show that harmful microorganisms could be present in the water
- at times of high turbidity in the source water (meaning that large amounts of silt make the water dirty)
- if the water pressure drops due to equipment failure or power outages
- because of a break in or repairs on a water main
- if the water source has been flooded or there is a significant inflow of stormwater
- during situations that warrant special action to protect consumers' health.
A boil water notice does not mean that the tap water you drink will make people seriously ill, but it does mean that the bacterial level is higher than allowed by law or that the treatment process is compromised.