Cook County, IL Environmental Rules: Vehicle Idling Restrictions (2026)
Key Facts
- Governing section
- Cook County Code § 30-384
- Incorporated statute
- 625 ILCS 5/11-1429 (state idling law)
- Scope
- Countywide, except City of Chicago
- Fine range
- $300 to $10,000 per violation
- Continuing violation
- Each day counts as separate offense
Summary
Cook County's environmental code doesn't set its own idling limit: it adopts and defers to Illinois' state idling law, which supersedes any conflicting county requirement, across the County outside Chicago.
Sec. 30-384. - Idling of motor vehicles. The state requirements for idling, as codified at 625 ILCS 5/11-1429, shall apply and supersede any conflicting requirements listed in this Chapter.
Full Breakdown
Chapter 30 of the Cook County Code, the County's environmental chapter, which applies countywide except inside the City of Chicago, addresses vehicle idling in a single provision. Section 30-384 states that the state idling requirements codified at 625 ILCS 5/11-1429 apply and supersede any conflicting requirement elsewhere in the chapter. Rather than writing its own minute limit, the County defers entirely to Illinois' statutory idling standard, so drivers and fleet operators anywhere in Cook County outside Chicago are bound by the state rule, not a distinct county cap.
Violations & Fines
Idling violations fall under Section 30-131's general Chapter 30 penalty: fines of at least $300 and up to $10,000, with each day of continued violation counted as a separate offense.
Frequently Asked Questions
Does Cook County set its own vehicle idling time limit?
Does this idling rule apply in Chicago?
What happens if I violate the idling rule in Cook County?
Sources & Official References
Other rules in Cook County
Compare Cook County to another location·View the Illinois environmental rules overview
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