Xianyang air quality

The air quality in Xianyang is slightly polluted.

Xianyang, located in Guanzhong area of Shaanxi Province, Wei Fen Plain, is one of the key cities for air pollution prevention and control in China. From the overall situation of air quality, in 2022, the comprehensive index of urban ambient air quality in Xianyang was 5.39, which was 6. 10% higher than that of 202 1.

The number of days with good air quality is 184 days, which is 6 1 day less than 245 days in 202 1 year, and the proportion of days with good air quality in the whole year is 50.4%. The days of severe and above pollution were 15 days, which was 4 days less than that of 202 1 9 days.

The air quality in Xianyang is still at a backward level in cities all over the country. Among the 1- 168 key cities announced by the Ministry of Ecology and Environment in 2022, Xianyang ranked second from the bottom in air quality; Among 0/3 cities (districts) in Shaanxi Province/KLOC, Xianyang ranks last in the days with good air quality.

Generally speaking, the task of improving air quality in Xianyang is arduous. PM2.5 and PM 10 are still the main pollutants of air pollution in Xianyang. At the same time, ozone pollution has a rising trend. Xianyang urgently needs to make great efforts to control air pollution and accelerate the coordinated control of particulate pollution and ozone pollution.

Existing problems and challenges

Industry, traffic and dust are the main factors affecting air quality. The main sources of atmospheric particulate emissions in Xianyang city are fixed combustion sources of fossil fuels, process sources, dust sources and biomass combustion sources; The main sources of sulfur dioxide emissions are fixed combustion sources and process sources of fossil fuels.

The main sources of nitrogen oxide emissions are fixed combustion sources, process sources and mobile sources of fossil fuels; VOCs emission sources are scattered, mainly from solvent sources, biomass combustion sources, process sources, fixed combustion sources of fossil fuels and mobile sources. Generally speaking, the emission of air pollutants such as industry, traffic and dust is the main factor affecting the air quality in Xianyang.

Unreasonable industrial structure and layout is the fundamental problem of air pollution control. Xianyang city is located in the transition zone between Guanzhong Plain in central Shaanxi and Loess Plateau in the north. In 2022, the proportion of tertiary industrial structure is 14.5: 47.4: 38. 1, which still accounts for a high proportion of industrial output value. The industrial layout is unreasonable, and the city's population, industry and service industry are mainly distributed in the southern counties of Xianyang City.

Nearly 45% of the brick kiln factories are located in the upwind direction of the city, extending about 25 kilometers to the center of the city, densely distributed in the urban area, which has a great impact on the air quality of the city; Coupled with the influence of terrain and meteorological factors, it is easy to cause heavy pollution of PM2.5 in autumn and winter in Xianyang and frequent weather with excessive O3 in summer.

The refined management level of air pollution prevention and control needs to be greatly improved. During the "Thirteenth Five-Year Plan" period, Xianyang City intensified its efforts to control air pollution and achieved certain results. However, there are still obvious shortcomings and weaknesses in the energy consumption structure, urban heating structure, industrial development structure and transportation structure, and the pollution problems in key areas, key fields, key industries and key time periods are still outstanding.

There are some problems such as low pollution control efficiency, low environmental management level of enterprises, and extensive unorganized emission management methods. Based on the above factors, the planning period will further accelerate the improvement of pollution source emission management level and highlight the precise and scientific "governance" of gas.

Reference to the above content: Baidu Encyclopedia-Xianyang City