Equipment Depot of Illinois Grayslake facility serves all of Lake County and the surrounding regions east of Hwy 59 to I-94, from Antioch, Fox Lake and Lake Zurich across to Waukegan through Lake Forest to Highland Park. We are the local service that you can trust – Performance. Guaranteed. Our experienced team has an unwavering commitment to service and is ready to develop a customized solution to meet your operational needs.