SAN DIEGO - Mayor Jerry Sanders Friday vetoed an ordinance passed by the City Council earlier this month that prohibits the development of so-called "big-box" superstores within San Diego city limits.

The City Council voted 5-3 on June 4 to ban new retail establishments within the city that are larger than 90,000 square feet and generate more than 10 percent of revenue from non-taxable goods, like groceries.

"In my opinion, the vote to ban a certain kind of store within our city limits is not good public policy because it limits the options available to consumers," the mayor said.

At a news conference outside a Kearny Mesa Wal-Mart, Sanders said the law would "deprive families of the option to enjoy significant savings when they shop for the basic necessities of life, including groceries."

He said the ordinance "puts government in control of where we shop."

"I don't think that is the proper role of government," Sanders said.

"The council's message also sends a message that San Diego isn't business friendly," he said. "That's a message I don't think we can afford to send."

Proponents say the prohibition on superstores is needed to preserve neighborhood character and protect union pay and benefits.

Sanders said the law is unfairly aimed at Wal-Mart, which operates a chain of Superstores around the country that average about 185,000 square feet.

The council can overturn the mayor's veto with five votes.

If that happens, Sanders said the issue will likely be brought before voters through a referendum.