An oil spill on Friday (Jun 14) has led to beaches around Singapore being closed. Clean-up efforts are still underway, with slicks also spreading to the Southern Islands tourist attractions and sighted as far east as the Changi area.

Does the oil spill incident has had a wider impact beyond the blackened beaches?

What are the long-term effects of the petrochemicals on Singapore's waters and the determinants that would make it safe for people to return to water activities? 

Audrey Tan, Assistant News Editor, The Straits Times explains.