2013 University of Maryland summary of Hookah legislation by state.
Links
[1] https://www.law.umaryland.edu/programs/publichealth/documents/Hookah_50_State_Survey.pdf
[2] http://www.rethinkpot.org/tags/public-health
[3] http://www.rethinkpot.org/tags/hookah
[4] http://www.rethinkpot.org/tags/policy
[5] http://www.rethinkpot.org/tags/2017-legislation