Spokeswoman Sarah Hamilton said the costs included extra police on the streets, trashpickup, other sanitation and traffic control for the Tuesday event.
In areas where Waste Management already handles trashpickup, it would be relatively easy for its crews to stop by the storm drains to clean out captured debris and change out filters.
In four out of the five districts with over 43 CFA core members, floor shininess has increased 63% and frequency of trashpickup has gone, on average, from 1 to 26 times in a day.