The environmental bureau in Shanghai promised to give a more comprehensive report on the state and sources of air pollution in the city.
The move is a response to a query by Tang Jingbo, deputy of Shanghai People's Congress, in which the official sought more detailed data on the condition of pollution in the city.
The Shanghai Environmental Protection Bureau said on Sunday that the data it will release will include factors brought on by seasons as well as difference in the impacts they make across the city.
The report will also provide an action plan for dealing with pollutants, according to Shanghai Daily.
The environmental bureau had previously said that 25 percent of PM2.5, found to be the foremost source of smog in Shanghai, are given off through emissions by factories.
Twenty percent of the pollutant, meawnhile, comes from vehicles and a further 20 percent from sources outside Shanghai.
The remaining percentage is made up of the pollutant emanating from other origins such as bonfires and construction site dust.
Tang expressed doubt about these figures, claiming the bureau does not have adequate data on PM2.5 and thus cannot correctly identify the breakdown of the pollutant's sources.
The lawmaker added that the chemical compositions of the pollutants cannot be a basis for the identification of their sources.
He cited the belief being propagated among the public that nitrogen oxide's source is traffic emission, saying that the pollutant can also be produced by factories.
The bureau responded to this and said that the breakdown they had released was only an initial account of PM2.5 sources in the city.
It said that it was only in 2013 that the Shanghai Environmental Monitoring Center started giving reports on PM2.5 density.
Tang's proposals are welcome and the bureau is currently gathering data for a more comprehensive report, the approval of which by experts will be sought, it said.
The bureau has not given a timeframe for the report.