You're gonna love this one. I was talking to a police officer friend who works in the 18th district (the station on Division just east of the river, among the remnants of Cabrini-Green). He says the station is infested with mosquitos. The front desk now has its own bug zapper and citronella candles. One of the desk sergeants was joking that the candles create a special ambience for yuppies brought in after being arrested. One joker suggested tiki torches, but that was vetoed as a fire hazard.
Note: the 18th district station is recent construction, about 5 years old. If it has enough of a water leak for a mosquito population, we're talking some fine construction. ;)