The putrid stench began wafting through open windows and on streets on Tuesday, according to civic activist Danny Ruscillo. It continued on Thursday.
Rockaway Park smelled like rotten eggs. And nobody knew why.
Some people blamed the wastewater treatment plant on Beach Channel Drive, which has been known for giving off a smell.
But this time the odor was emanating from a stinky algae bloom in a low-lying piece of marshland in Jamaica Bay, experts said.