While no major glitches were immediately reported, the site was slow to load once users clicked on a tab that said "Start Here." Officials had predicted delays on the first day and said many would merely be seeking information rather than signing up for coverage, which begins in the new year.
"Like anything when you first start, you've got to adjust a little bit," said Pat Macht, a spokeswoman for Covered California . "The system's not been down, but it might have had some slower response time. But people are signing up."
Gov. Jerry Brown, meanwhile, announced he had signed a package of bills to help implement the new law and expand the state's Medi-Cal program for those who are too poor to pay for the subsidized insurance.
"While extreme radicals in Washington shut down our government, here in California we're taking action to extend decent health care to millions of families," Brown said in a statement, referring to the impasse in Congress that has led to a partial shutdown of federal government operations.
California officials said the shutdown had no effect on the state exchange.