I'm comparing among California counties by mapping them on two similar measures around Grocery Bag. One of them is "Ban on Single-use Plastic Bags" and another is "Carryout Bag Charge".

Source: California Secretary of State - General Election - Statement of Vote, November 8, 2016. (http://www.sos.ca.gov/elections/prior-elections/statewide-election-results/general-election-november-8-2016/statement-vote/)