Email Security Warning!
When sending an email to the Comptroller of Maryland, do not include information such as your full social security number (use only the last 4 digits), bank account numbers, routing numbers, or any other sensitive information.
If you wish to send sensitive information, email a description of the issue (without the sensitive data), and let us know you have confidential information to send. We will reply back via an encrypted email account, which will have "##secure##" in the email subject. In reply to the secured email, you may then provide the additional detail, including the sensitive information.
The Comptroller's Office routinely tests the quality of motor fuels sold in Maryland. If you have a question or complaint about fuel quality, call 410-260-7388.
Maryland's testing program checks fuel quality at all points along the distribution chain, and stops the sale of fuel that does not meet accepted quality standards. The comptroller maintains a petroleum testing laboratory, which is consistently recognized as a leader in its field. Samples representing about two billion gallons of gasoline, diesel fuel, home heating oil, and other fuels are tested each year. Only about 1 percent of the fuel tested is found to be substandard.