Beijing saw better air quality and more "good air" days in 2017, while the city's water quality also improved, according to a report released by the Beijing Municipal Environmental Protection Bureau on Wednesday.

The city has met the goal set by the State Council in 2013, the report said.

The capital saw 226 good air days in 2017, 28 days more than in 2016. The number of heavy pollution days decreased by 16 to 23, according to the report.

Water quality has also improved. The density of ammonia nitrogen dropped to 2.62 milligram per liter of water, down 51.5 percent compared with the previous year, the report said.

A total of 92 percent of the city's wastewater was treated last year, according to the report. The city used more than one billion cubic meters of recycled water last year, 26.6 percent of the city's total water consumption.