Detroit, you're not alone. 

Across the nation, cities and states are watching Detroit's largest-ever municipal bankruptcy filing with great trepidation. Years of underfunded retirement promises to public sector workers, which helped lay Detroit low, could plunge them into a similar and terrifying financial hole.

Nine states—Hawaii, Alaska, Kansas, Rhode Island, New Hampshire, Louisiana, Connecticut, Kentucky and Illinois—have now set aside less than 60 percent of what they need. Illinois has saved just 43 cents to cover every dollar of what it needs to pay 350,000 retirees and 500,000 current plan participants who are counting on a pension check.

Without a pension check, public sector workers face a bleak retirement. Many are ineligible for Social Security.

Check out this state map of pension funding level at CNBC.com.