Vietnam's environment police said Thursday a Japanese company was caught red-handed dumping untreated waste in Hanoi's Noi Bai Industrial Zone last week.
The Toyoda Giken Vietnam, which produces lampshades and press mold parts, discharged the sewage from its factory to the zone's irrigation ditch through an underground pipe, the police said.
They said the company built its own sewage facility to sneakily dump untreated waste rather than joining the industrial zone's waste treatment system.
Yamanochi Fumitaka, company deputy director, admitted the sewage contains toxic substances including hexavalent chromium, which is recognized as a human carcinogen via inhalation.
Following a meeting with the police, the company has destroyed its waste discharging facility and re-connected to the zone's system.