WASHINGTON - By providing free consulting and some software, Google Inc. is helping state governments make reams of public records that are now unavailable or hard to find online easily accessible to Web surfers.

The Internet search company hopes to eventually persuade federal agencies to employ the same tools - an effort that excites advocates of open government but worries some experts on consumer privacy.

Google plans to announce today that it has already worked with Arizona, California, Utah and Virginia to remove technical barriers that had prevented its search engine, as well as those of Microsoft Corp. and Yahoo Inc., from accessing tens of thousands of public records dealing with education, real estate, health care and the environment.

These newly available records will not be exclusive to the search engines owned by Google, Yahoo and Microsoft.

Patrice McDermott, director of OpenTheGovernment.org, a coalition of more than 65 watchdog groups that advocate greater government openness and accountability, lauded Google's efforts. Since the Sept. 11, 2001, terrorist attack on the United States, many public agencies have tried to restrict certain data from the Internet because of concerns about national security.

Despite the obvious benefits of this Google initiative for those conducting Web searches, privacy advocates said they were worried about unintended consequences, cautioning that some records may contain personal and confidential information that should not be widely available.

Marc Rotenberg, executive director of the Washington-based Electronic Privacy Information Center, said many public-health and financial records should not necessarily be widely available because they often contain citizens' Social Security numbers. Such information should be deleted from records regardless of whether they are viewed online or in person at a government office, he said.

Rotenberg also said Google had a "checkered past" on privacy, noting that the company tracks Internet search users who access government data in order to target ads at them. The privacy group recently filed a complaint with the Federal Trade Commission urging it to investigate Google regarding such activities, as well as its proposed acquisition of online-advertising company DoubleClick Inc.

Officials from states working with Google hope that the education and tools provided to them by the Mountain View, Calif., company will make it easier for average citizens to navigate agency Web sites. "Unless you had a master's degree in government administration, you probably wouldn't find the actual information you're looking for," said Chris Cummiskey, Arizona's chief information officer.

J.L. Needham, who manages Google's public-sector-content partnerships, said at least 70 percent of visitors to government Web sites get there by using commercial search engines. But too often, he said, Web searches do not turn up the information people are looking for, simply because government computer systems aren't programmed in ways that allow commercial search engines to access their databases.

Still, if users can't get the information they are looking for, they blame the search engine, not the government, Needham lamented.