A spokesman for Rio de Janeiro's Olympic organizers says there's "no plan B" for the 2016 games' sailing competitions, though the state's top environmental official has acknowledged that pledges to clean up the waters of the sailing venue will not be met.

Spokesman Mario Andrade says Olympic organizing officials are assuming the goal of treating 80 percent of sewage generated around the Guanabara Bay will be reached. His comment Tuesday came just days after Rio's new Environment Secretary Andre Correa acknowledged at a news conference that the cleanup pledges are unattainable.

With vast amounts of sewage and household garbage flowing into the bay and just a year and a half to go before the games, Olympic sailors' health and safety has become a hot-button issue.