Diesel Idling

Consequences of Diesel Idling

Learn more about diesel idling and the consequences for maintenance costs of vehicles, health and global warming.

Diesel Idling Restriction Ordinance

Learn more about the Vehicle Idling Restriction Ordinance (Maricopa County Ordinance P-21).

Idle Control Programs / Technologies

Discover existing idle control programs and technologies available to assist owner/operators in controlling their use of diesel idling.

Report Diesel Idling Violations

To report a suspected idling violation, call the Maricopa County Air Quality Department at 602-372-2703 or use our Air Quality Violation Report Form.