China's State Council has released a plan for the country's second national census on pollution sources, with the results to be published in 2019.
Seven years after the results of the first national pollution census, the government launched a second survey to investigate the scale, structure and distribution of pollution sources.
The survey will cover industrial, agricultural and residential pollution.
China aims to finish the survey in 2018, releasing the results in 2019.
China published the results of the first national pollution census in 2010, which targeted nearly 6 million objects of industrial sources, agricultural sources, residential sources and centralized pollution control facilities, collecting 1.1 billion items of basic data on pollution sources.
The survey found agricultural pollution was having a major effect on China's water supplies, prompting government efforts to clean up rural areas.
After decades of rapid expansion brought smog, contaminated soil and water, China is steadily shifting from GDP obsession to a balanced growth philosophy that puts more emphasis on the environment.
Measures have been taken to control pollution, such as a revised environmental protection law and the introduction of a "river chief" system. The government has drawn red lines in certain regions to strengthen protection.
China is to cut its carbon emissions per unit of GDP by 60-65 percent from 2005 levels by 2030 and raise the share of non-fossil energy in total consumption to about 20 percent.
