The Social Security numbers of 63,000 people who received Agriculture Department grants have been posted on a government Web site since 1996, but they were taken down last week. Free credit monitoring is being offered to those affected.

The Agriculture data that included Social Security numbers were removed from the Web on April 13 and similar data from 32 other agencies were taken down April 17 as a precaution, said Agriculture spokeswoman Terri Teuber.

A review has determined that none of the other 32 agencies had a similar problem, said Sean Kevelighan, spokesman for the Office of Management and Budget.

"There is no evidence that this information has been misused," Teuber added. "However, due to the potential that this information was downloaded prior to being removed, USDA will provide the additional monitoring service."

The breach was discovered by Marsha Bergmeier, president of Mohr Family Farms in Fairmount, Ill. "I was Googling my farm name at 11 p.m. when I couldn't sleep," she said in a telephone interview, and details of her land loan came up in the second listing of the Google search, a private Web site that reposted the government data.

The next morning, April 13, she contacted the Agriculture Department, her congressman, Rep. Tim Johnson, the private Web site and the Census Bureau and was surprised by how quickly they removed the personal information.

"If somebody downloaded it, it's still out there in the world," she said. "That will never be a private number again."