Anti-social behaviour in Cornwall and the islands costs authories over ?18 million a year.
This figure was based on a survey by the Cornwall and Isles of Scilly Community Safety Partnership. It counted the number of incidents from a week in April when 1,800 anti-social incidents were recorded. This created a bill of ?350,000.
A new survey, which started on Thursday, will reveal the difference between school holidays and peak season and other quiter times of the year.