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RESEARCH TRIANGLE PARK, N.C. — Making Internet and broadband access widely available will not guarantee that many people will use the Internet at any speed, a new federal survey shows.

In North Carolina, only 58.6 percent of residents have Internet access at home, and of those 3.5 percent use slower dialup connections.

When access at work on anywhere else is included, 65 percent use the Net.

In South Carolina, 54 percent of families surveyed use the Internet, with nearly 4 percent using dialup. Including other access, the percentage of Internet users climbs t0 62 percent.

Across Georgia, Net usage is higher at 63 percent with under 2.9 percent dialing up. Counting work and other access, the Net audience climbs to nearly 69 percent.

Including all Southern states, the Internet home audience is under 60 percent and the universe of work/other net users is 65 percent.

Those percentages were among the data released in a new survey disclosed Tuesday that is based on Census information.

Overall, roughly 40 percent of Americans do not have high-speed Internet access at home, according to that underscore the challenges facing policymakers who are trying to bring affordable broadband connections to all Americans.

The Obama administration and Congress have identified universal broadband as a key to driving economic development, producing jobs and bringing educational opportunities and cutting-edge medicine to all corners of the country.

"We’re at a point where high-speed access to the Internet is critical to the ability of people to be successful in today’s economy and society at large," said Larry Strickling, head of the National Telecommunications and Information Administration (NTIA), an arm of the Commerce Department that released the data Tuesday.

The NTIA and the Rural Utilities Service, part of the Agriculture Department, are in the middle of handing out $7.2 billion in stimulus funding for broadband. Most of that money will be used to build networks in parts of the country that lack high-speed Internet access.

In North Carolina, MCNC, which is located in RTP, is receiving $28 million of that funding to expand the N.C. Research and Education Network.

Meanwhile, e-NC, the organization tasked by the N.C. General Assembly, recently received other federal funding to expand its map of where broadband is and isn’t available across the state.

And next month, the Federal Communications Commission will deliver policy recommendations to Congress on how to make universal broadband a reality. Among other things, the FCC is expected to propose expanding the fund that subsidizes telephone service in poor and rural communities and finding more airwaves for wireless broadband services.

FCC Chairman Julius Genachowski said Tuesday he wants 100 million U.S. households to have access to ultra high-speed Internet connections, with speeds of 100 megabits per second, by 2020. That would be several times faster than the download speeds many U.S. homes with broadband get now – 3 megabits to 20 megabits per second.

Genachowski also wants the U.S. to test even higher broadband speeds. One such testbed network could come from Google Inc., which said last week it plans to build a few experimental fiber-optic networks that would deliver 1 gigabit per second to as many as 500,000 Americans. That would be 10 times faster than a 100 megabit-per-second connection.

The NTIA report released Tuesday stems from a Census Bureau survey of about 54,000 households conducted in October of last year. The statistics show that U.S. broadband usage continues to grow, with 64 percent of U.S. households subscribing to high-speed Internet as of October, up from 51 percent two years earlier.

But the results also highlight remaining hurdles, particularly in rural America. While 66 percent of urban households subscribed to broadband in October, that was true for only 54 percent of rural households, the survey found.

That is partly because broadband is not as widely available in rural areas. The phone and cable companies that provide the bulk of broadband connections in the U.S. have been slower to build high-speed systems in places that are too sparsely populated to justify the costly network investments.

Lack of broadband availability is only part of the challenge for Washington, however — because even in places where broadband is available, not everyone subscribes. Among households that do not have broadband, the survey found, 38 percent said they don’t need it or are not interested. Twenty-six percent said it is too expensive. Only 3.6 percent said they do not subscribe because it is not available where they live.

For policymakers, Strickling said, this means that helping people see "what they are missing" is another important piece of the puzzle. Last year’s stimulus bill set aside at least $250 million for broadband adoption programs to teach people computer and Internet skills and ensure they have the equipment to get online.

Other key survey findings include:

• 89 percent of Americans with an annual household income greater than $150,000 used a broadband connection at home in October, compared with 29 percent of Americans with a household income less than $15,000.

• 67 percent of Asian Americans and 66 percent of Caucasians used broadband at home in October, compared with 46 percent of blacks and 40 percent of Hispanics.

• Home broadband usage was highest among people aged 18 to 24, at 81 percent, and lowest among people 55 and older, at 46 percent.