Workplace smoking laws apply to all enclosed indoor areas. Exceptions include state fairgrounds, designated smoking areas of the National Guard, and correctional facilities.
Smoking is prohibited in all enclosed indoor areas. Smoking is permitted in outdoor areas not otherwise prohibited by law, unless employer chooses to prohibit smoking there. Such areas must be marked with signs.
Iowa does not require employers to create designated smoking areas or provide other accommodations for smokers in the workplace.
Iowa doesn’t specifically require employers to provide workplace accommodations for nonsmoker employees.
Iowa laws don’t address employer policies on smoking in the workplace. Local laws regulating smoking -- at the city, county, or town level -- may require employers to have a policy on smoking in some areas. And, even though it’s not required by law in Iowa, employers are generally free to adopt policies on smoking in the workplace if they choose to.
An employer shall not discharge, refuse to employ, or in any manner retaliate against an employee, applicant for employment, or customer because that employee, applicant, or customer exercises any rights under this law, registers a complaint, or attempts to prosecute a violation of the law.
If you want to go right to the source and look up Iowa law on workplace smoking laws -- or if you're writing a letter to your employer or employee and want to cite the applicable law -- the relevant statute(s) can be found at Iowa Code Sections 142D.1 to 142D.9. Workplace smoking information is also available in Nolo's books Your Rights in the Workplace, by Barbara Repa (Nolo) and The Employer's Legal Handbook, by Fred Steingold (Nolo).