Air Pollution Complaints

The ARB's Complaint Program conducts special investigations of air pollution complaints from all over the state of California, monitors the ARB's complaint hotline and informs Air Pollution Control Districts of possible violations of district rules and assists in conducting selected complaint investigations. To reach the ARB's Vehicle Complaint Hotline, please call 1-800-END-SMOG or 1-800-363-7664.

Idling Bus or Vehicle at or Near a School
To report a bus or commercial vehicle idling at or near a school, please click on the link above.
Idling Commercial Vehicle
To report a commercial vehicle which is idling in excess or unnecessarily, please click on the link above.
Smoking or Idling Locomotive at Rail Yard
To report a locomotive which is idling or smoking excessively, please click on the link above.
Smoking Vehicle
To report a vehicle (car, truck or heavy-duty vehicle) which is smoking excessively while in operation on a local street or on the highway, please click on the link above.
Other Air Pollution Complaints
To report an air pollution complaint not listed above, which may include open burning, factory emissions, or restaurant emissions, please click on the link above to send an email to the ARB's Complaint Program. You may also telephone the our Complaint Hotline at 1-800-952-5588.

Telephone Hotlines
Vehicle Complaint Hotline: 1-800-END-SMOG
General Air Pollution Complaint Hotline: 1-800-952-5588

Complaint Resolution
If you would like to learn more about how to resolve air pollution complaints, please review the ARB's Complaint Resolution Protocol (in English or Spanish.)

U.S. EPA
To report an environmental violation that falls under federal jurisdiction, please visit the U.S. EPA Compliance and Enforcement website, which also includes detailed information regarding what constitutes a federal environmental crime.

Complaint Program Contacts
Complaint Investigations:
Please contact Carl Brown by email at cbrown@arb.ca.gov or by telephone at (916) 323-8417.

Idling Vehicle Complaints:
In Northern California, please contact Renae Hankins by email at rhankins@arb.ca.gov or by telephone at (916) 322-8275. In Southern California, please contact Hortencia Mora by email at hmora@arb.ca.gov or by telephone at (626) 350-6590.

Locomotive Complaints:
Please contact John Oback by email at joback@arb.ca.gov or by telephone at (916) 322-8046.

Smoking Vehicle
Complaints: In Northern California, please contact Renae Hankins by email at rhankins@arb.ca.gov or by telephone at (916) 322-8275. In Southern California, please contact Hortencia Mora by email at hmora@arb.ca.gov or by telephone at (626) 350-6590.

ARB Enforcement Programs