MANILA - Several businesses operating on Boracay island will be asked to respond to findings of environmental violations in their water systems, an environment department official said Thursday.

The Department of Environment and Natural Resources inspected several "big hotels" in Boracay and will be sending show cause orders to companies that were found non-compliant with the Clean Water Act, Environment Undersecretary Art Valdez said.

These include Crown Regency Resort and Convention Center, one of the largest hotels on the island, he said.

"With that, it will send a signal to everybody that they have to protect and maintain the recreational quality of Boracay," Valdez said in a press conference.

Boracay was recently named the "best island in the world" by international luxury and lifestyle travel magazine Condé Nast Traveler for its "powdery white sand and shallow azure water ideal for swimming and snorkeling."