This story was originally published September 14, 2018.

New York (CNN Business) Coal has been knocked down. But it's not out by a long shot.

Even though coal has been in steep decline, it's still the most-used electricity generation source in 18 US states, according to government statistics published this week.

Not even natural gas, a rapidly growing and cleaner burning fuel, leads in that many states. The numbers underscore how large pockets of America continue to rely heavily on coal for power and jobs.

"It's hard to unseat a former champion. It doesn't change overnight," said Matt Hoza, manager of energy analysis at consulting firm BTU Analytics.

Coal is still the most prevalent fuel for electricity in parts of Appalachia, including Ohio, Kentucky and West Virginia. It's also the leader in other major coal-producing states such as Colorado, Wyoming and Montana.

Read More