Information from the Statistics and Census Service (DSEC) indicated that the land area of Macao measured 30.5 km2 in 2016. The population density went up from 21,100 persons per km2in 2015 to 21,400 persons per km2.
The annual mean air temperature went down by 0.6 ºC year-on-year to 22.6 ºC. The lowest temperature of the year was 1.6 ºC in January, the coldest January recorded since 1948, and rain with small ice pellets was observed for the first time. Total precipitation was 2,335.6 mm, up by 994.6 mm year-on-year.
As regards the air quality in 2016, all five monitoring stations in Macao registered an increase in the number of “Moderate” air quality days. The high density residential area in Northern District hadthe highest number of “Poor” air quality days, at 19 days, followed by 17 days recorded in both the high density residential area in Taipa and at the ambient monitoring station in Coloane. The ambient monitoring station in Coloane recorded the highest number of exceedance days for fine suspended particulates (PM2.5) among all monitoring stations, at 7 days. Meanwhile, improvement was shown in the number of exceedance days at the remaining four monitoring stations in the Macao Peninsula and Taipa. Moreover, 66 days with acid rain were recorded in 2016.
Total water consumption was 86,703,000m3 in 2016, up by 2.1% year-on-year. Water consumption by the business sector (44,173,000 m3), households (36,976,000 m3) and the government sector (5,553,000 m3) increased by 2.4%, 1.8% and 1.5% respectively year-on-year. The Waste Water Treatment Plants treated an average of 229,521 m3 of waste water per day, up by 18.9% year-on-year.
A total of 239,993 tonnes of domestic waste and 137,949 tonnes of waste from the business sector were collected in 2016, up by 5.0% and 10.8% respectively. The Refuse Incineration Plant treated a total of 503,867 tonnes of municipal solid waste, up by 1.7% year-on-year; volume of construction waste sent to landfill totalled 3,269 tonnes, down substantially by 32.4%.