Officials said the village's water system lost pressure just after 12:30 p.m.
"A preliminary investigation revealed that a telemetry system malfunction, possibly caused by the extreme cold temperatures experienced over the last three days, led to the loss of pressure," officials said in the press release. "Immediately upon learning of the malfunction, village crews responded by overriding the automatic operating system and manually pumping water back into the system. Normal water pressure was restored in less than 30 minutes."
The boil order was issued in accordance with Illinois Environmental Protection Agency regulations, officials said.
"During the boil order, bottled water should be used for drinking, cooking, washing fresh fruits and vegetables, hand washing, and tooth brushing. If bottled water is not available, the affected tap water should be used for these purposes only after it has been boiled for five minutes," officials noted.
Original story: A boil order is in effect in Grayslake until further notice.
Crews were working earlier to restore water pressure in the village.
Village officials posted this message on the village website regarding the boil order:
During a boil water order, residential and commercial users of affected public water supplies 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. If bottled water is not available, the affected tap water should be used for these purposes only after it has been boiled for FIVE MINUTES.
3. The affected water may be used for dish washing if a dishwashing machine is used. If dishes are hand washed, boiled or bottled water should be used. The affected tap water may be used if the clean dishes are immersed for at least one minute in a sink of water to which one full tablespoon of regular household bleach has been added.
4. The affected tap water may be used for bathing and/or showering.
5. The affected 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 water lines and clean faucet screens.
2. Purge all water-using fixtures and appliances of standing water and ice such as refrigerator ice makers or coffee makers.
Community Consolidated School District 46 is advising students to bring bottled water to school Jan. 9.