Greenpeace East Asia’s Tianjin Rapid Response Team tested open sources of water for traces of sodium cyanide in residential areas 5km, 3km and 1km from the blast site, as well as at the Haihe River bank where large quantities of dead fish were recently found. In total, water at seven sites were tested.
On the night of August 12, double explosions at a chemical storage plant - the first equivalent to detonating three tonnes of TNT, and the second equivalent to 20 tonnes - rocked Tianjin port in northeast China.

The Ruihai Logistics Company warehouse in the Tianjin Binhai New Area, an industrial base located along the coast of the Bohai Sea, was storing a number of highly hazardous and highly reactive chemicals, including hundreds of tonnes of sodium cyanide.