SHANGHAI (REUTERS) - China's Hebei province was the location of six of the country's 10 smoggiest cities in 2017, the same as the previous year, despite a campaign to improve air quality during the winter when smog levels peak, according to environment ministry data published on Thursday (Jan 18).
Hebei, China's biggest steel producing region, was part of a special six-month crackdown aimed at reducing smog build-ups over the winter. That is when coal consumption traditionally surges to run boilers for heating, resulting in an increase in harmful air pollutants.
According to figures published by the Ministry of Environmental Protection (MEP), Hebei's provincial capital of Shijiazhuang saw the highest average reading in all of China last year of particulate matter with a width of 2.5 microns, known as PM2.5, which is easily inhaled into the lungs to cause respiratory damage.
Hebei's smog levels have an outsized effect on China's capital of Beijing since the province surrounds the city.
Also among China's ten worst performing cities were Hebei's cities of Handan and Tangshan, the world's biggest steel producing city, as well as Xingtai, Baoding and Hengshui.
However, in December alone, only four Hebei cities were included in the top 10, suggesting the winter crackdown on emissions from industry, coal and transportation had a significant impact.
Hebei as a whole saw PM2.5 concentrations hit 65 micrograms per cubic metre last year, down 7.1 per cent compared to 2016. It has promised to cut the figure by a further 14 per cent by 2020.
The head of the provincial environmental bureau, Gao Jianmin, also said earlier this month that the province would strive this year to remove the cities of Shijiazhuang, Hengshui and Tangshan from the top 10 worst performer list.
Overall, average PM2.5 readings in 338 monitored cities across China reached 43 micrograms per cubic metre in 2017, down 6.5 per cent compared to the previous year, according to MEP data.
According to research published by environmental group Greenpeace last week, Beijing, Hebei and other parts of northern China saw dramatic improvements in air quality over the winter as a result of the crackdown as well as more favourable weather conditions, but progress stalled in other parts of the country.
Greenpeace estimated that nationwide PM2.5 emissions fell 4.5 per cent, lower than the official MEP figure and the smallest decline since 2013.
China's official PM2.5 standard is 35 micrograms, while the World Heath Organisation recommends levels of no more than 10.