Five other parks have yet to release enough wastewater for their treatment system, while the final two are putting the finishing touches to their own systems, said Le Viet Hung, head of the department.
Meanwhile, automated wastewater observation stations have been set up in 17 industrial parks, 14 of which have been built by the province with a total investment of 77 billion VND, he said.
Air supervision stations have also become operational in three other parks, helping control pollution in the sites, said Hung.
Dong Nai has found 150 factories causing environmental pollution, with 11 facilities forced to halt their operation due to serious impacts to the environment, he said.
The official also revealed that 185 production establishments that are failing to ensure environmental safety will be removed from residential areas by the end of 2015.
Source: VNA