Tortola is one of the premier destinations for bareboat sailing charters. However, in the BVI, sailboats are not required to have holding tanks for sewage storage, as they are in the U.S. Virgin Islands. Instead, each boat pumps its raw sewage into the surrounding water. There are rules against flushing the head (toilet) in a marina, but it appears to be unenforceable.
Road Town collects its sewage and pumps it without further treatment into the Sir Francis Drake Channel, several hundred yards offshore.
Toilet paper is not allowed to be flushed from boats. Instead, used toilet paper must be disposed of in the trash can next to the toilet.