If Harbor Patrol deputies board your boat in Newport Harbor and ask to see the restroom, don't be offended. They're just doing their job.
When the Orange County Sheriff's Harbor Patrol contracted with Newport Beach to continue overseeing the harbor's 1,200 or so moorings, they also took on a new task: checking the plumbing.
In the next 60 to 90 days, the Harbor Patrol will roll out a new dye tab program, where deputies drop a tab of a colored dye into the toilet and flush. They then watch the harbor water around the boat to see if any of the dye appears. If the water surrounding the vessel changes color, that signals a leak in the plumbing, which means that the boat is polluting the water.