The roads of Boracay is clean, and they always have to keep it clean since the roads are a bit tiny but not squishy. Vendors and stores near the road are required to have their area cleaned or there will be a fee. Most vehicles that I saw on the streets of Boracay are usually just tricycles and a few passenger vans where most tourist pay for their transportation so is always clean.
Depending on the season, there are times where some areas of the beache get a bit dirty because of washed-up algae and dead seaweeds. I think it happens only during the rainy seasons. When I went there during the summer, the place was crowded but still clean. The beaches were also very clean and the waters was crystal clear, and I did not find any washed up algae or seaweeds.
Graugart, Christian. White Beach, Boracay. Wiki Travel, N/A, 22 December 2006, http://wikitravel.org/en/Boracay
There was this activity that I tried where I had to wear diving helmet and feed the fish underwater with a bread. The reefs looked clean but the spot where we were feeding the fish only had a few corals. But I know some areas of the sea have a really beautiful coral reef but its just that I wasn’t able to see them myself.