Exterminators will now be required to report to the Department of Public Health about
the number of units that they treat for bedbugs each month. While they
won’t have to include the address of the infested apartments or hotels,
they will be required to identify each unit’s census tract to help chart
the bugs’ distribution around the city.
http://californiawatch.org/dailyreport/san-francisco-track-bedbugs-trails-18667