Community events provide a space for residents to gather, celebrate the achievements of their community, and support local businesses. Event planners, participating vendors and event attendees can do their part to prevent stormwater pollution by following the tips listed below: If it isn’t rain it doesn’t belong in the drain! All chemicals, oils, and waste should be disposed of properly during and after community events. Any materials including chemicals and other substances used in cleaning or cooking that may be stored outside should always be covered when not in use. Covering harmful materials prevents them from being washed into storm drains during rain or snow melt events. Trash cans and dumpsters should always be properly covered. Covering trash receptacles ensures that harmful bacteria is not washed into waterways.