Updated: January 10, 2014 1:28PM
The village of Grayslake today has lifted a precautionary water boil that went into effect Wednesday.
For nearly two days, residents had to boil their water after the water system lost pressure, likely due to the stress of the extreme weather on equipment.
The village water system lost pressure around 12:30 p.m. Wednesday due to a telemetry system malfunction, possibly caused by the extreme cold that began Monday. Village crews responded by overriding the automatic operating system and manually flipping the switch to start pumping water back into the system. Normal water pressure was restored in less than 30 minutes.
Bill Heinz, director of public works and village engineer, said the telemetry system is a computer system that controls pumps on water systems, both fresh water and sewage, and reacts to what sensors tell it. Sensors in the water system apparently froze and the water level got down to a point where the water pressure was compromised. If the pressure goes too low, contaminates can find their way into the system.
Due to the loss in pressure, the village is required by the Illinois Environmental Protection Agency, to issue a water boil order for residents.