Approximately 906 customers in Clay County are now under a boil water notice, according to the Mississippi State Department of Health.
The notice issued on Thursday morning warns customers under the Siloam Water Association No. 3-Beasley Well to boil their water before drinking.
A check valve malfunction produced a system-wide pressure loss.
"When a distribution system loses pressure, contaminants can siphon back into the water," a press release from the Mississippi Department of Health said on Thursday morning. "Public health officials consider any system that loses pressure contaminated until tests prove otherwise. Health officials strongly recommend that all water be boiled vigorously for one minute before it is consumed."
The Mississippi Department of Health will notify the water system as soon as tests show the water is safe to drink.
Checklist for safe water use:
1. Do not drink tap water while the water system is under a boil water advisory.
2. Do not drink from water fountains in parks, public or private buildings that receive water from the affected system.
3. Do not use ice unless it has been made with boiled water. Freezing will not necessarily kill harmful bacteria.
4. Do not use tap water to make drinks, juices or fountain soft drinks.
5. Wash dishes in boiled water or use paper plates for the next few days.
6. Wash fruits and vegetables with boiled water or bottled water. These items may have been affected at the grocery store by the contaminated water.
7. Brush your teeth with boiled water.
8. Only cook with tap water if the food will be boiled for at least one minute.
Tips from the MDH.