BEIJING - All provincial regions in the Chinese mainland reached their targets for pollutants emission cut last year, China's Ministry of Environmental Protection (MEP) said Wednesday.

Except Taiwan, Hong Kong and Macao, which are not included in the statistics, the other 31 provinces, municipalities and autonomous regions in the Chinese mainland and Xinjiang Production and Construction Corps reached their targets, according to a report issued by the MEP.

All of the eight centrally-administered state-owned energy enterprises, including PetroChina, Sinopec, Huaneng, Datang, Huadian, China Power Investment Corp. and Shenhua, also reached their targets for annual cuts in emissions.

The evaluation included four indicators, chemical oxygen demand, ammonia nitrogen, sulfur dioxide and nitrogen oxide. Statistics showed that in Beijing the four indices dropped significantly, down 5.4 percent, 3.82 percent, 9.35 percent and 9.24 percent year-on-year, respectively.

The nation's total emission of the four pollutants also dropped last year compared to 2013. Compared to 2010, the emission of all the four pollutants dropped around 10 percent, according to the report.