Houston-area gas stations cited for bad gasoline, pump violations Know about these violations before filling up for Memorial Day weekend.

Memorial Day weekend is the start of the summer season, making it popular road trip weekend for families and friends to get away.

Whether you're planning on driving to a different city or hitting up various parties around town, you'll want to be sure that your gas tank is full, but be sure you're going to a properly maintained and honest gas station.

I-10 ROAD TRIP: Fun places to stop along the I-10 route from Houston to Florida

From March 22 to May 23, gas stations across Greater Houston were inspected by the Texas Department of Agriculture officials to catch any possible dishonest pump charges, maintenance issues or safety hazards.

Check out the images above to see those who were cited. (Story continues below ... )

Fortunately for drivers, getting shorted at the pump is uncommon, but it can come in different forms. Here's a list of the most common reasons gas pumps (often known as multi-pump dispensers) are found to be out of compliance:

Short measure in excess of tolerance: The pump shorted the customer gasoline by an amount greater than the allowed amount. According to the agriculture department, the allowed tolerance for diesel and gas pumps in six cubic inches, or about six tablespoons of gas when a five-gallon test measure is used.

Two times the tolerance: The pump delivered less fuel than the amount indicated on the display by more than twice the allowed amount.

Improperly maintained: The gas pump, whether regular gas or diesel pump, is not properly maintained to the state's requirements.

See the gallery above for a look at the Houston area stations that have been flagged.

BEST IN TEXAS: Unique places to vacation in the Lone Star State