A Survey on Quality of Atmospheric Environment in South Lake Central Ecological Park in Tangshan City

Objectives To monitor and assess the atmospheric environment quality and analyze the primary pollutant and the pollutants beyond the national standard limits in South Lake Central Ecological Park in Tangshan city.

Methods The sampling spots were arranged according to the construction status and the distribution of functional areas in the park, and seven monitoring areas were selected. The control point was in another park located at the windward side. The concentrations of SO₂, NO₂, O₃, total suspended matter (TSP), PM₁₀ and PM_2.5 in the ambient air were determined. The air quality of each selected area and the whole park area was assessed by calculating individual air quality index (IAQI) and air quality index (AQI).

Results PM_2.5 was the primary pollutant in the park and the concentration of PM_2.5 in the whole park was higher than the national standard limits. Other pollutants were all lower than the standard limits.In seven monitoring points, the levels of SO₂, O₃, TSP, PM₁₀, PM_2.5 and IAQI in the botanical garden were the highest. The AQI in the park was 115.6 and the air quality was grade Ⅲ.

Conclusions PM_2.5 was the primary pollutant and the only pollutant beyond the standard limits during the monitoring period. The air quality was grade Ⅲ, the status of air in the park was mild polluted.