The city conducted 26 “Clean Sweeps” in 2012, the most in a single year, Mayor Byron W. Brown said last week.

The events target troubled neighborhoods in a single day, when crews from City Hall converge unexpectedly on a city block, bringing law enforcement, animal control, forestry workers and public works employees to clean up the area. Health and human service agencies also take part, distributing dental kits and telling people how to apply for food stamps and health insurance.

The city baited 3,100 properties for rodents, pruned 1,068 trees, mowed 650 lots and removed 118 tons of debris during the cleanups. The city chooses areas to visit by using data from quality-of-life complaints.