Most states still require face masks to reduce the spread of Covid-19. These are the ones that don't

(CNN)While health officials agree face masks help prevent the spread of Covid-19, state and local governments have varied widely on implementation of mask rules. Now, President Joe Biden wants to change that.

Biden's office has released plans that his administration intends to implement in the beginning of his term, and one is a national mask mandate "by working with governors and mayors."
Most states already have some type of mask mandate, but some have no statewide rule -- either leaving it as a recommendation or giving the authority to local officials.
Here are the states with no statewide mask requirement.
Alaska
Alaska does not require the use of masks, limit group size or business operations. All the state does is encourage Alaskans to do their part to limit the spread of Covid-19, recommending that residents practice social distancing and wear a mask, without any mandate.
The mayor of Anchorage, though, has signed an order requiring people to wear face coverings in public.
Arizona
Gov. Doug Ducey, a Republican, allows individual counties to mandate a mask, but does not have a statewide initiative. Scottsdale was the first to make masks mandatory starting June 19. Other major municipalities with requirements include Phoenix, Tucson and Flagstaff.
Florida
There is no statewide mask requirement, yet some local municipalities have their own mandates.
Georgia
Statewide, masks are required for some essential employees, including restaurants and personal care services employees.
Meanwhile, several counties and cities have mask mandates.
Idaho
The state does not have a statewide requirement, but several local municipalities do, including Boise.
Iowa
The state implemented a mask mandate in November, but in February Gov. Kim Reynolds lifted the requirement.
"We know what we need to do and it doesn't require a government mandate to do it," Reynolds said at the time. "Prior to November, Iowa didn't have a mask requirement but most Iowans wore masks, and I am confident they will continue to do so."
At the time, the governor said virus activity in Iowa was declining, noting that the statewide average positivity rate had fallen into single digits.
Mississippi
On September 4, Gov. Tate Reeves, a Republican, lifted the state face covering requirement.
Just over a month later and amid rising case numbers, Reeves signed an executive order requiring face coverings in counties with higher Covid-19 case numbers. The "Safe Recovery" executive order is in effect through December 11 and includes 22 of the state's 82 counties.
Missouri
The state does not have a statewide requirement, but several local municipalities do.
Montana
Montana had a mask mandate, but newly-elected Gov. Greg Gianforte let it expire in February, though he said local communities may continue to enforce their own mandates.
"Since we're not out of the woods yet, I will continue to wear a mask, and I will encourage all Montanans to do the same," he said at the time.
Nebraska
There is no statewide mandate, but clients and staff in barbershops, salons, tattoo parlors and massage parlors must wear masks, as part of the current Directed Health Measure requirements.
North Dakota
North Dakota didn't have a mask mandate until November 2020, and let it expire in January.
"We put the mask mandate on when hospital capacity was approaching its peak and that's when we applied it because that's when we needed. Again as we are right now with less than 2% of our total hospital capacity being applied towards Covid patients," said Gov. Doug Burgum in February, during an appearance on CNN Newsroom with Brianna Keilar.
"We've always encouraged masks from the very beginning ... In our state it's not about what government says, it's about what people do and if people can socially distance, if people are in places where they need to wear a mask, we've seen people step up and they are doing what they need to do and that's reflected the numbers."
Oklahoma
The city council in Oklahoma City voted in a special meeting in July to approve an emergency public safety ordinance requiring face coverings in indoor public places throughout Oklahoma City.
South Carolina
Several counties and cities, including Charleston and Columbia, have mask mandates.
South Dakota
Gov. Kristi Noem, a Republican, has taken a hands-off approach to Covid-19. In October, she wrote in an op-ed that the government should not mandate a mask requirement.
"As I've said before, if folks want to wear a mask, they should be free to do so," she wrote. "Similarly, those who don't want to wear a mask shouldn't be shamed into wearing one."
South Dakota is second -- only to North Dakota -- in the