All O’Fallon Water Customers Currently Under a Boil Order

City Hall

Illinois American Water, the City of O’Fallon’s water supplier, has issued a water conservation and boil order for all customers in the O’Fallon area until further notice. This order impacts all O’Fallon water customers, including those in O’Fallon and Fairview Heights.

For information about this water conservation and water boil order, please contact Illinois American customer service at 1-800-422-2782.

O’Fallon water customers have been asked to conserve water and to restrict all non-essential water use until further notice.

In addition, Illinois American’s water quality team will be switching treatment to a form of chlorine known as “free chlorine,” which does not contain ammonia. Illinois American Water has used this stronger disinfectant in the past and made a similar, temporary switch in the fall while flushing water mains and fire hydrants.

If you have a health care need that requires purified or filtered water, you should reach out to your healthcare provider with any questions.   During the temporary treatment change, customers may experience a more noticeable chlorine taste or odor in their water.  There is no reason for concern. This is due to the switch in chlorine types.

During a boil water order, water customers should take the following measures to protect themselves from consuming potentially contaminated water:

  1. Bottled water should be used for drinking, cooking, washing fresh fruits / vegetables, hand washing and tooth brushing.
  2. The affected tap water can be used for these purposes but only after it has been brought to a rolling boil for 5 minutes.
  3. The affected tap water may be used for bathing or showering.
  4. The affected tap water may be used for household cleaning.

NOTE:  If the tap water is cloudy and / or contains particles, bottled water should be used.

After the boil water order is lifted or water service resumes, these precautionary measures should be followed:

  1. Flush the building’s water lines and clean faucet screens.
  2. Purge the water-using fixtures and appliances of standing water and ice, such as refrigerator ice makers or coffee makers.

If you would like more information about this topic, please contact Illinois American Water at 1-800-422-2782.