In November of 2016, California voters approved Proposition 64, the Adult Use of Marijuana Act (AUMA). Under Proposition 64, adults 21 years of age or older can legally grow, possess, and use cannabis for non-medicinal purposes, with certain restrictions. In addition, beginning on January 1, 2018, AUMA makes it legal to sell and distribute cannabis through a regulated business.

Local city and county governments can restrict or ban cannabis businesses in their jurisdiction. Cannabis remains legal for medical use by patients of all ages who have a physician's recommendation under California's 1996 medical marijuana law

This series is a compilation of stories covering how Napa County and its city governments have approached the cannabis discussion.