BEIJING -- The nuclear test conducted by the Democratic People's Republic of Korea (DPRK) on September 9 has not affected China's environment, according to the country's environmental watchdog.

The DPRK announced the success of its nuclear warhead test September 9, the fifth by the country since 2006.

On the day of the test, the Ministry of Environmental Protection launched its second-highest level of emergency response to monitor radiation levels along the country's northeast border.

Readings over the past six days showed that radiation was within the normal range.

The ministry terminated its emergency response on Wednesday morning, but said it would continue monitoring the situation.